[delhanty]

I understand why Brave are subject to the Apple AppStore TOC.

What I am not clear about is why Brave would be subject to YouTube’s TOC.

[Otek]

as pointed by the user layoutIfNeeded it's this point of TOC

>5.2.3 Audio/Video Downloading: Apps should not facilitate illegal file sharing or include the ability to save, convert, or download media from third-party sources (e.g. Apple Music, YouTube, SoundCloud, Vimeo, etc.) without explicit authorization from those sources.