Can't watch YouTube HTML5 videos on Opera
When I try to watch a youtube video, there is a note: "Please install Adobe Flash Player ". I tried to turn on html5 player but it doesn't help.
Not all videos are offered by YouTube in ‘HTML5 format’. Notably videos with advertisement or videos very recently uploaded to the service.
I have watched videos which were uploaded one month ago, but there is the same picture. Safari plays this videos with no errors.