Invidious is an anonymous browser or ‘proxy’ for YouTube. It allows regular browsing of YouTube and it also acts as a YT downloader. If you are capable of hosting software or running a docker image, you can set invidious up on your own servers via this open-source project. If you would rather just jump right in and get downloading youtube videos, subtitles, or just anonymously watching youtube open the invidious youtube server at invidious.domain.glass 
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Features of Invidious include
- Download Youtube Videos
- Download Youtube Audio (Youtube to MP3)
- Download Youtube Subtitles