Update 19Oct2025: 14 choices for each resolution, each in a different language track, none of which are labeled.

I really enjoy downloading videos at home to watch at work or while traveling. After donating I am able to sometimes download in 1080. Easy to use.
Edit: I am dependent on this add-on for Firefox as it allows me to watch YouTube videos offline as well as avoiding all the ads that Google deems necessary for the CEO to make more money.
I support this developer and I hope you do as well.