So I created an open-source Lemmy bot to reply to posts/comments with YouTube links with converted Piped links to preserve your privacy.

Piped is an open-source alternative privacy-friendly frontend to YouTube. You can watch the same content from YouTube without connecting to Google’s servers.

You can find the source code at: https://github.com/TeamPiped/lemmy-piped-link-bot

You can find Piped’s source code at: https://github.com/TeamPiped/Piped

PS: I’m the author of Piped :P