Thanks, most of the videos are working now. Chromium browsers keep giving an error on those external links though (everything works on FF):
https://dzen.ru/video/watch/622dc7dcd6fb0a2f43694398
https://dzen.ru/video/watch/6064b0d9a898ba23f9c30f0b
https://dzen.ru/video/watch/66b9d03c3c4ae618104196f3?share_to=link
It's not a big problem, if you can't find the cause of the error, no big deal.

Another small problem - there's a gray spinner:
https://i.imgur.com/wMgHhRf.png
https://dzen.ru/articles/