Vinegar - Tube Cleaner

Vinegar is a Safari extension that replaces the YouTube player with a minimal HTML video tag.

It removes ads, restores picture-in-picture, and keeps videos playing in the background.

Note: The "can read and alter webpages" text in the permission section is just unfortunate wording. Vinegar needs access to the web page to find the YouTube player and replace it. Its not doing anything creepy!

(By the way, check out Vinegars companion app, Baking Soda. Its basically a less powerful version of Vinegar, but it works on all websites other than YouTube.)