Thanks for this..

I had gotten a similiar one which was called Addon Star what ever with similiar specs and stand but also with clamps that hold a pcb . It was about 80€ before covid and I had paid a year ago over 104€ also shipped from CZ republic quite fast by dhl if I remember right. At the end the stand is rock solid, the display is quite decent and good enough to do the job even though I quite often think that I would prefer they would offer a tablet or phone holder cause our phones and tablets have usually a far better quality then these displays. I simply use it and have not measured all the features, I just turned it on and checked if that could help me in such cases I need that. And if you watch Videos like yours you can far easier judge about the quality cause beyond 100€ you can find tons of offers. The full metall stand is the really impressive part and the camera and display work at least quite well.

Is this good for mobile repairing?

7 inch is nice.

Have you succeeded in connecting it directly to the pc which you mentioned in your video? If yes how? I am about to order one.

Just checked what I had bought last year when I had also found a coupon code Andonstar AD208S: 8,5" 5x - 1.200x Digital Microscope 1.280 x 800 Adjustable 1080P 88€ with the lightning and pcb holder clamps incl. shipping from CZ republic - also the display is tiltable independently from the stand which offers more options in case of difficult objects that still have wires connected or where you need more head room. And the key reason to buy that on was the website of the manufacturer that also offered support in english and from where I had gotten help when I had later lost a part, the spring under that clamp holder has jumped away and I needed a replacemend they had even send me for free - paid just 1,8€ for shipping from china which took about 3 weeks and was even trackable.