If you're fine with downloading YouTube videos for playing locally, I've found 4K Video Downloader works well, at least under OS X. You'll wind up with plain H.

If you're fine with downloading YouTube videos for playing locally, I've found 4K Video Downloader works well, at least under OS X. You'll wind up with plain H.264/AAC MPEG-4 files. https://www.4kdownload.com/download https://www.4kdownload.com/download