Video playback problems in Safari, macOS Big Sur
After installing macOS Big Sur I have video playback problems in Safari (YouTube for example) - it seems like it is not a video, but slide-show or something. I tried to change resolution settings from 1080p to Auto, or even to 480, but it does not get better - the speed and "smoothness" is terrible.
I also can not find the Adobe Flash Player any more on my system, and I can not download it and install because of its EOL - https://www.adobe.com/ru/products/flashplayer/end-of-life.html
About my Mac: - MacBook Air (13-inch, Early 20150), macOS Big Sur 11.2.2, Intel HD Graphics 6000 1536 Mb, 50 Gb free of 128 GB HD.
Any help will be appreciated. Thank you in advance.
MacBook Air 13″, macOS 11.2