I went to YouTube to watch the VALENTINE'S DAY STREAM by Marc Rebillet and started the Picture In Picture mode.
When the video is in one of the bottom corners, it looks great with a bit of margin:
When it is in one of the top corners, I think it is missing a bit of space at the top because it is adjacent to the menu bar:
I expect to have a bit more space between the menu bar and the video when it is as the top.
An option to configure the gap would be quite lovely.
Version 0.99.126.4.1.7-rc (WebKit 619.1.1)
Sonoma (14)