The only options I've found til a fix:
Videos:Use WorkSpaces Activate PIP on the Videos Move back to the working WorkSpace
To use a WorkSpace just for Video Sites helps for an easy management
Music:Go to Opera://Flags Activate Custom SideBar Panels Add the Music Sites to the SideBar
Or the same steps as Videos
For Social Networks you can use FullScreen or use them on SideBar since isn't affected by Animated Media Icon.