Hate to say about it but I'm ethically Chinese and I just happened to know some little thing about it...I know it's a great gambit so I hope I don't have to use the race card at the very least...
Then people straight out attacking me thinking I'm attacking China...
Were you born and raised in China? If not, this is the lamest reply ever. Using any "race card" is never okay, not only because it is just a perversion of appeal to authority, but also because your ethnicity does not impart any special secret knowledge about the universe that a few supporting links can't also reveal. Appealing to your ethnicity is not a proxy for being a member of some culture.
It seems to be an old (last updated 2 yrs ago) project providing some kind of gui for youtube-dl.