Troubles with Video playback on you tube

I use Libre Wolf. In the last week I started having problems with video playback on YouTube. The video is constantly interrupted or the image freezes, but the sound continues to play. This is not always the case, but about half of the time. I have tried many options, including disabling plugins and changing the resolution, but nothing helped. I have no problems with the speed of the connection. When I changed the browser (to Opera), then the problem with playback immediately disappeared. So the problem is in the browser. Tell me how to solve it.