Oh, sorry! I pasted wrong url, anyway - here is gallery of few films/gifs (probably webm format, not sure, cant check): https://kwejk.pl/przegladaj/3140375/0/gify-z-nieoczekiwanym-zakonczeniem.html
(I dont know what's there, dont judge me!)
I tried disabling all extansions, default adblocker is always disabled, i tried fresh install (look switching to stable version). Not gonna delete my stuff tho, escpecially now, when i know im not alone with that problem.
Meanwhile i discovered that even not all youtube videos are working. Here's an example:
Same - black screen, audio working fine in background.
And to be more "official".
Your OS (Linux, Mac, Windows)
Windows 10 1709
Your version of Opera
Now Opera 51, stable channel. Meet issue before on Opera 52 Dev. Opera 50 stable worked fine till update.
If the problem is with a page, a link to it
A screen-shot of the problem if it's related to something not showing as should
Steps to (try to) reproduce the issue
Simply using Opera.