Hi, thanks for mentioning this problem.

For the duration, yes it's 50 seconds and 49 hundreths of a second, I will try to make the display of the duration clearer.

Steemit is really the app that best support embedded videos, the other ones are much weaker in this domain, but that's something that is beyond our control. But normally, clicking on the picture should redirect you to the video. Maybe Partiko doesn't allow redirections to external links ? (I have never used it so I can't say).