Issue here: I do not want to go back to Chrome, since opera works faster, but, if I have to sacrifice things for speed, I will have to think what is the convenience. I can't watch movies on Twitter.
This browser does not support video playback.

So, MODERATOR, or someone, please help.

Could that be the reason?

Yes, it can be related to the OS.

NO it is not, this is Windows XP updated with 3rd., Trouble is that when I installed it last week, no worries were offered by Opera, not even a warning on impossibilities or issues. No warning at all. so I am expecting an answer.