I'd also suggest maybe adding the channel names (like the comment you posted here) to the app itself (although i think it's cool when it's unnamed and you get the old-school feeling of channels just being numbers).
Also, I'd love to have permalinks for the channels. Not for the individual videos themselves, but just a link that when sharing would bring somebody else to the same channel you're watching right now.
Another thing, although probably outside your control, is that I use a Firefox extension called "SoundFixer" that I use to force the youtube audio to mono (since a lot of channels are annoying to me using headphones, they pan the audio sources too hard left/right and it's super distracting), but it doesn't seem to work on this website, probably because of the way they're embedded. I don't know if this can be changed somehow, or have a mode to force mono audio (which would be also oldschool like old TVs with one speaker only!). It's probably too niche and hard to do though.
Also I don't seem to find any volume control except mute?
I find this interesting. Are you oversensitive? I've never even considered that this could be an issue. Do you experience the same problem with other things like music and games?
So when things are mixed "improperly" (it's subjective), it's very distracting to me. I don't need to force mono everywhere, but it's very common in amateurish channels, and surprisingly also in movies and TV shows. Big productions tend to mix assuming you'll play on speakers (where it's fine to have something playing on just one channel/speaker, since both your ears will hear it), but when it mixes down to stereo and you listen on headphones, it's soooo common for them to pan something 100% to one channel when the source is supposed to be on that side. Like, somebody speaking to the left of the camera, and it comes 100% on the left channel and 0% on the right one. It's so unnatural and annoying to me.
Exactly, and this highlights the big difference between using headphones and using speakers. When you listen to some stereophonic music with one of the instruments panned completely to one side, through speakers that sound will only play from that side, however the sound will bounce around your room and you'll hear it in both ears, and the difference will tell you where it's coming from. But when you listen through headphones, you don't get this effect, and it sounds weird. With modern computing devices, it shouldn't be that hard to run the music through a filter that mixes the two channels when using headphones to avoid this problem. I wouldn't want to mix them to mono (that sounds bad too), but just a slight reduction of the stereo separation would be good.
I wouldn't know because I consider all those effect libraries, mixers and presets ("Concert Hall" - who would ever want that?) that usually come with the audio chipset driver suite as bloatware and try to get rid of them, or at least never touch them - but it would surprise me if there weren't anything that affects the amount of stereo separation...?