This is definitely really cool, too. I like that it shows that a node in a filesystem is just another way to represent some resource, but in a way that's a little more familiar to most people than something like procfs.
That said, it's also amazingly wasteful, and abusing a free service for a purpose it isn't intended for.
It definitely needs a mount option to set the default quality. Changing it later might be tricky, maybe passing options in directory names would be a good idea? for example: mkdir "foobar [q:720p]"
It changes every comment to a mix of
> Derp herpy derp derp
while still allowing you to click and see the "quality" comment that the person left.
https://chrome.google.com/webstore/detail/herp-derp-for-yout...
would make it easy to reexport this file system, e.g. Over http or smb.
A reasonable solution would be ability to set max results and disabling next/prev. All desired results would show up in the search directory (if you can assume that results beyond some point are useless).