Thanks for all the answers, guess there is nothing more to be helped with. Good luck.

@burnout426 thank you very much for clearing this out, one problem less it is. somehow problem with videoplayer not working is solved by activating vpn. Might you have an answer for that one too?

@leocg and that's where the strange stuff kicks in. screen of the link with error

yet somehow - screen of the global privacy settings without any errors.

as a bonus - rightclicking videoplayer i can't load due to "plug-in disabled" gives the "movie not loaded" message in the menu.

@vzdornoff even websites like http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager.html
get same plug-in blocked treatement.

Yet somehow Global Privacy Settings panel there works just fine and with no error messages of sort.

@leocg Test run: allow all sites to use flash. Exception: allow.
Plug-in blocked / run plug-in this time dialogue option appears, yet has no effect.

allow all sites to use flash. Exception: block.
dialogue option is gone, yet i can not use flash player-based video player with "Flash player blocked" message in it.

@leocg did reinstall it just now to try things out. Nothing changed, sadly.

Good evening. I've ran into a trouble with opera "plug-in blocked" kind of messages.
I run Opera Beta 52.0.2871.9 on Windows,
have none extentions active as of now, and website settings for Flash set:
Ask first before allowing sites to run Flash (recommended).

Whenever i enter any website using flash (some video-hostings mostly), i have to manually allow flash as i should do, but after that opera gives me "plug-in blocked" message in the adress bar and flash application, should it be a videoplayer or whatnot does not start. Repeatedly clicking "run plug-in this time" does not seem to show any effect. Please help?