I'm interested.
In response to your survey questions:
I'm not really classically trained, and poor at reading sheet music. However, I've been kind of improvising/arranging pieces for a few years now.
- Been playing piano for around 5 years now.
- Pieces in my repertoire: Schubert Impromptu op 90 no 4, Chopin Nocturne op 9 no 2
- Theory and harmony: Equivalent of first semester college harmony (diatonic harmony), as well as a bunch of knowledge about different topics (jazz scales, modulation, etc.) picked up along the way.
-- scales, arpeggios, chords: I know most of the common ones (church modes, whole tone, octatonic scales, etc.; major/minor/diminished/augmented with extensions, etc.) by name and have used them in the past. However, I can't claim to have a really in-depth knowledge of each.
-- understanding the harmony in the pieces I play: I can do this just about fine. I can figure out what the chords are and how they relate according to functional harmony (maybe not perfectly, but it gets the job done). I've completed an online course which taught the basics of four-part harmony, counterpoint, form, etc. but the concepts have grown rusty over time.
I can typically follow most music theory analyses I read and pretty much anything which other Youtube music theory channels (Rick Beato, 8bitmusic, Nahre Sol, etc.) have to say, so I don't think understanding theoretical analyses of any sort would pose a problem.
From my perspective, please pitch the videos to as high a level as you would like to. There's a glut of beginner tutorials on Youtube, and a real scarcity of quality content.