They do? As in, paying will expose a control on their player to enter PiP in supported platforms?
Note: other than FF, you can also trigger PiP (edit: on Safari) on a YouTube video by double-right-clicking on the video element OR long pressing on the speaker icon on the tab/address bar.
YouTube app on Android supported this some time ago. If you were playing a video and then wanted to go to some other app, a small floating window appeared with that video playing.
It was then locked away behind YouTube Premium, and now YouTube (non-premium) occasionally bugs you to pay for the premium when you try switching to another app so that you can continue playback.
> other than FF, you can also trigger PiP on a YouTube video by double-right-clicking on the video element OR long pressing on the speaker icon on the tab/address bar.
Neither of these worked for me. Chrome 83 on Win 10.
PiP works on Firefox (and likely Chrome, haven't tested) for Android.
iOS just announced PiP support, but formerly on iPad had PIP. A quick google shows that PiP does work for Safari on iPad.
First, right-click on a YouTube video. You'll see their custom menu appear first. Now, right click next to their menu (while still somewhere on the video frame.)
You should then see the browser contextual menu with 'Picture-in-picture' in the list of options.
Note: other than FF, you can also trigger PiP (edit: on Safari) on a YouTube video by double-right-clicking on the video element OR long pressing on the speaker icon on the tab/address bar.