Obviously this issue has not been solved.
I am running into the very same problems with my YouTube Videos.
There is no pattern to be recognized.
Some videos work fine and the “view media” link is displayed in a tweet, and then again only the link is displayed in a tweet. This way the videos do not get any attention.
And frankly, I am really running out of patience. Because I tweeted to @Support already before, withoujt getting any reaction. And here, I have to register as a developer, just to ask a simple question. And I am anything but a developer - I can tell you this much.
Guys, you make Billions with this platform. Start acting like it and show some respekt to the users!
At the very least that would mean to provide some decent support.