@nvmjustagirl The first reverted it to old PiP but was just black.
the second one worked eventually, and seems pretty stable as of now so that's the one that worked for me. I say eventually cause at first it was just a black screen as well, but after retesting all of them it suddenly showed the video, although it would freeze after 3 seconds. But closing it (the PiP not the browser) and opening it a few times made it work. This happens anytime something loads (a website or a video, even bringing up this reply box froze it) but honestly it's a small price to pay for a working PiP.
The third looked to work but then I clicked on a different video and my entire Opera froze and i had to force it close. When I opened it back up, the PiP would freeze immediately.
Thanks for your help