thanks for the feedback!

Hi, Luca has created the music from scratch for this video!

That's a good question and I think it has to do with the concept of chords vs scale. The scale may be the C minor scale, which are all the notes that you can play. But the chords themselves are composed of notes from those available in the scale. To illustrate it further, the c minor chord would be the 1st, 3rd and 5th notes from the c minor scale. If you wanted to play the 1st, 2nd and 5th notes from the c minor scale, I think the chord would then be a c minor sus2 chord, which is possible, it will just have a different feel. A c minor 7th chord, would have 1st, 3rd, 5th, and 7th notes from the scale. And if you wanted to, I guess you could play a c minor 7th sus2, which would be 1st, 2nd, 3rd, 5th, and 7th notes from the scale. Btw, when you include the 4th note, the name of the chord becomes sus4. For example a c minor sus4 would be 1st, 3rd, and 4th note in the scale. Depending on the context, it may sound good. But it depends on the feel you're going for, as well as what other chords you play with it. But maybe someone else with better music theory knowledge can correct me if I'm wrong 😊 I'd have no idea what this chord would be called: 1st, 2nd, and 4th note from the scale... The reason they're not as common/popular is because I think there's also a dependence on the amount of semitones (notes) in between each note that have harmonious effects and sound "pleasant" to the ear. That's why the 1st, 3rd, and 5th note go well together, they harmonize according to the underlying mathematics and physics of the vibrations that make up the scale.