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The video started with Keerti interviewing Harkirat; and ended with a 180-degree role reversal. Harkirat is a smooth operator. 😂

Harkirat has now become a common face in Indian Youtech community ❤

The way keerti is explaining the concepts and logic shows she has more theoretical knowledge and Harkirat is being more practical here like there will be need of updating user’s profile picture if storing that in meta data etc… and i think that should be the approach to any system design problem which is way more than just drawing boxes.

The fact that Harkirat's channel has grown massively over the last few months is because he has this original element in his content and ppl can relate with what he says. Being someone who's pivoting from Non tech to Tech, I'm truly inspired by Harkirat.

That tcp and udp discussion was superb.. Thanks keerti di for this wonderful video ❤❤

This guy has very good real world work experience which is very clear from his questions and suggestions while Keerti has a lot of theoretical knowledge, just an observation.

From this awesome System design discussion I could clearly see that these two folks have a very different thought process. Where Keerti likes to discuss about the Highlevel system design. And The dude likes to see the knitty gritty of the problem and visualizes how it will actually look physically.

A littile correction is 2.7 bilion is monthly active user not daily.Daily active user is 127 milion.Great work

Great informative video! Just to add more on TCP/UDP part, KZfaq and other social media platforms where live streaming is performed, they use Dynamic Adaptive Streaming over HTTP (DASH) protocol which is based on TCP since it gives adaptive bit rate streaming - different resolutions , also video meta data with chunks adding functionality and most importantly as it uses TCP, the video quality is guaranteed . On the other hand, WebRTC uses combination of TCP and UDP, which result into poor quality at some point of time due to lost packet. WebRTC is more reliable for real time communication like video calling, peer to peer communication etc.

The way you explain KZfaq system design is truly commendable. We also believe in making these concepts accessible by makin video on system design of Microsoft teams

Designing youtube is a very large example. The outcome of building such a system will only result in a very vague solution and it might not be that helpful. I would love to see designing videos of different components of youtube (example, there will be a lot of details and tradeoffs required in uploader and splitter service) instead of whole youtube and going a bit more in detail. There are a lot of creators who create such vague system design videos, but I would highly appreciate if any indian creator makes system design videos that are actually practical and are in much more depth. This will highly benefit the tech community. BTW love the content of this channel. Hope to see such good content in future too. 😊

"I agree with you I know about it" LMAO that was funny

Upload to view ratio might be a lot lower than 1:100, I guess. About TCP vs UDP, apart from consistency and quality, TCP allows the user to seek back. WebRTC is also an expensive choice btw, and is used for real-time use cases only. Overall feedback: 1. The information about ABR and the manifest file was interesting. 2. Designing KZfaq is a huge topic, but nice that you covered the basics well. It will be amazing to see more granular and detailed videos for each sub-topic. 3. Didn't feel like an interview, but was a good discussion. 4. Good video overall. Thanks. 👍

i am commenting this comment now i m going to recheck this comment after 3 years , lets see at that time in which position i am working on at what salary , currently iam student doing mca from nitk....

very nice walkthrough of the system design, kudos harkirat for opening up the network tab

nice content, really looking forward for your upcoming you-tubes component wise videos which will explain more minute components in more detail. keep up the good work !

16:46 A user having lots of videos would mean a coloumn in user table with data as array of videoID/ video URLs. This would make the table unnormalised (breaking 1NF). I think a better way would be to have userID as foriegn key in video info table (videoId, videoURL, userId).

Thank You Mam 👏👏👏 , It's really getting More Information about System Design, Please Keep It Mam ,Do More Video Like This🙏 .

Very useful discussion and excellent piece of content❤👌. Sharing it with my team for learning. Thank you for your contributions to the community.. 😊

Thanks Keerti and Harkirat. I liked the format of the video. It was more like a discussion rather than an interview. This led to a very free flowing conversation. Looking forward to more! :)

When you say that the splitter service will be splitting a video using a queuing service like RabbitMq, what do you really mean? Just using terms like splitting will happen using RabbitMq doesn't make any sense. RabbitMq is a MessageQueuing service i.e. something similar to AWS SQS wherein you send messages from a client to a server or vice versa. The input to such a splitting service can't be an entire video rather the video needs to be uploaded into an archival service for instance an S3 bucket and the path to the video must be passed to the splitting service in a RabbitMq message where the splitting service will then start to chunkify the video and do miscellaneous things with it.

Ok who is the interviewer here 😂 Hari so smoothly reversed the role

These discussions are mind refreshing as there are two different perspective of thinking for the same system, one is coder and other is a system designer. As a coder I can say she’s amazing at doing it theoretically with explaining it but with a practical coder, it even becomes more clearer to understand and design a better system all together ❤❤

bro was not allowed to speak in his interview :/

All wanted to help students😂

Believe user Id should not be used as it creates a security gap . Using api key or cookie to get the user Id in backend would be the right approach.

Two developers Harkirat with more practical knowledge and Keerti with more theoretical knowledge it was great video.

20:20 this is how you should think even the others knows too . just by using logical thinking .

Again, there is one more flaw. Chunking should be done on the client itself. The entire use of chunking is eliminated if we need to do it at the service

I wish the real interviews are as interactive as this. But no, this will not happen because in real life the interviewers think they designed all of the greatest applications in the world and have a ton of ego driving them.

Nice to see you back with the interview video. I love your interview video and it's very helpful, keep shining.

As much as I enjoy your videos / content and appreciate the fact that you take out time to do all this great work by sharing your knowledge and experience, it makes me kinda wonder if I over value your work. Me being an ex-Flight Engineer and understanding nearly everything you discuss, makes me think that you need to UP your game. Much more depth is expected from you. Sorry for blowing the heat, but if it improves the overall dynamics of coming to your channel and viewing your content, then it is worth to share a thought honestly. And Yes, we're it your dad and you, I would have totally be happy. But two icons talking meager...I better demand more.

Thank you for the system design video. What is the tool name that yiu are using as whiye board for design amd writing the requirements

Don't mess with Harkirat, he knows everything

Great discussion !! Learned a lot.

the first study video i enjoing so much , i think thats video going to my life , becouse know i devloped intreast in system design

for beginners who comes from different backgrounds can you please make a roadmap for them how to enter into sde role

@KeerthiPurswani another great discussion over designing KZfaq with @harkirat1. I have a suggestion and a question. Suggestion - On the DB design how about having channels table with unique channelID which gets referred in the users table as foreign key. Channels table will have S3 bucket ID containing all the video uploads of a user. Question- Will there be multiple manifest files corresponding to different bit rates or one file will contain all the chunks of different bit rates? How the switch between the bit rates happen depend on the bandwidth?

This was awesome video. Can you make system design for book my show and how to prevent double booking? It really help us. Thanks !!

Who is interviewer and who is interviewee

bro joined goldman and literally became a gold man 😮😂

The discussion in this video is pure gold 🌟

Thank you di! Would this also be important for people who want to work as ML engineers?

How are chunks handled, how does the actual storage work?

Great Discussion, Subscribed🤟

Great going. keep up the good work

@KeertiPurswani Just to clarify 2.1 Billion are monthly active users not daily, its approximately 122 million/day.

Hey Keerti, loved the video. But please go more in-depth into why and how, and the tradeoffs. Start simple, go in-depth, then expand the functionalities. Thanks a ton. Get to learn a lot.

It's a very high level design, if you can directly stream your data to s3 then why do we need splitter service? Also your encoding service will anyways going to create the hls chunks

Pushing the algorithm ❤

What a lovey way to explain

Very nicely explained

Hari kirat🤣🤣

Which note taking app is this ?

Humble K meets a bit of know it all H ..I am subscribed to both for the knowledge but would say K is next level in terms of humility . hope H learnt a thing or two .. nice video in terms of content .

27:56 server sending the next *chunk* in higer bitrate not the next *packet* . it nothing to do with packet management.

Sorry if I'm wrong and I'm quite new to system design but curious about this aspect: storing video URLs in the user data table. Wouldn't this practice potentially violate solid principles? 18:00

Explain protocols also Why no one talks about protocols HLS, Dash etc hearing about them first time😢

We shouldn't be sending userId in any post or get request. This will be a flaw in security.

this is amazing!

How to handle corrupt files or malicious files upload?

There are about 120 million daily active users on youtube. And 2.7 billion monthly active users. I think she got confused between daily and monthly.. since 2.5 billion per day would just be insane

All those estimations went in vain, it is no where justified in the designing.

Can we use it and extend it for e-learning system design ?

Commenting so I get this more of these on my feed.

TCP/UDP discussion was great.

CAP= in the event of network partition you can either get C or A

makes sense ...❤

22:05 when does it checks the plagiarism?

I watch 300-400 shorts a day easily .on weekends it is double triple.

What an idea !

one more question sorry : I take it the upload service is classed as a micro service and not a monolithic one as the upload is just one service we are demonstrating here..there will be other services as well( I don't know what but just have a. feeling there are)

beautifully done

How do we figure the number of chunks video needs be broken down into? And each packets size?

Awesome video❤

what is the best way to differentiate a functional requirement to an NFR..is there like a thumb rule ? how does one make that split to say this is FR versus NFR?

Mam the upload service gets the whole video from the user before sending it to splitter right, why do we need splitter the only pre processing that is required is encoding the video right , what other pre processing is required for the video to be split into chunks?

I also didn't get how you classed Like/Dislike ,Comments as Meta Data (is that because it data about data which means it is data related to the KZfaq video?)..

Just finished watching. Great video!! 👍

These guys are masters at their respective field. If anyone who is thinking of getting at their level coming from a low tier college, non tech, different work experience with not much skills then they need atleast 10+ years of experience and even then it will be difficult. These guys are really smart, high iq hard working folks of our country.

Very informative

why are we storing video packets in databse? Why not s3?

Hi Keerthi maam. is your HLD course taught in english or Hindi?

Interesting content!!!

Before 2018, system design was not a thing… what?

Around 20:00 I was having same question why would be store image name instead we can store Id and harkirat pointed it out immediately he thinks like me😂

First comment! Great content!

❤❤

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For Likes/Dislike, shares Graph DB would have been better choice

Harkirat extra class hogi kya iss week?

I started watching the video with interest but soon it became like a show off than a discussion … Harkirat could have contributed more if you would have let him

so the interviewer always writes on screen? I don't have a digital pen

who is interviewing who here? I could not say.

nice

So She was here to sell her course.

Video will be multipart file??? What format we use to store in s3??

systuuuummm

very nice. Dil maange more