I can't add much but I have to agree with the above replies, Aves is a wonderful gallery app, it looks good. Nice animations, Albums and Tags, Vaults for when u want to hide specific folders
Idk wym about chNging the quality but UM ACTUALLY you can download using an external downlosder like seal installed. And in the settings u can put the pkg name of the downloader which will then, if u set it to, downlosd the video using the native download button
I hate snap, because their store is proprietary and i think forcing something with a proprietary store on you is microsoft level shit which is why i left in the first place.
Also i dont like being "forced", theyre doing that a little with the apt install sometimes going to snap install
I really recommend Revanced or Revanced Extended instead.
As it uses the normal YouTube client but patched.
Just information for anyone who's interested, use whatever works for you