@Gwen-Dragon Hi . Thanks for the quick reply , and I am very sorry for my own very late reply .
First - Thanks for the small tip of vivaldi://gpu.
Second - After posting here , I DID went and updated windows ( along with some graphic drivers ) - and it all started to work ok .
I must say however ( again ) that even if I have resolved my personal problem, the video issue , IMHO , is not a trivial one , and upgrading / updating the system just for the sake of the browser , like I did , is not something that normal user would want, or even know how to , do .. The updating process itself took me 3 hours
Anyhow, on another note , non-video related issues , this browser is really cool, and all the people working on it are doing a really amazing job... so thanks .
Das Aktivieren von "WebGL-Erweiterungsentwürfe" unter Flags (weiter oben erwähnt) war wohl die Lösung, denn nach dem Update auf 1.7.725.3 lief der Strömungsfilm, ohne Fehlermeldung.
Deine beiden Tips hebe ich mir für späteren Bedarf auf.
Einen schönen Sonntag noch.
Thanks for your reply. I was expecting to see something in the browser frame like the bell. I prefer that to the windows notifications which are annoying as hell. Now that I know, I keep a tab open with the forum. But I don't think I should have to do that.