When I post a video clip in Discussions from the mobile app, the app doesn't render the post (the Discussion keeps loading and nothing shows up). But in fact the video post can be found in the browser view. The other problem is that if there's a video post in the Discussion, all the other posts (even text posts) in the same discussion can't be rendered too.
I am on iOS device and have reproduced this issue with an iPhone, two different iPads. Not sure if it has anything to do with my account type? I'm on a FTA.