I've had the same problem uploading one of my videos which was about 5 minutes in length. I uploaded one earlier which was shorter and that went alright. Viewly also worked ok using useruploads but also had some bugs once I started to register.
I think those platforms have a lot of potential but also need some improvement.
Oh it's a great idea but it is not ready to be live at all.
whats weird is its been out for a long time. Were getting close to prime blockchain time in the eyes of the world and they are seriously dropping the ball! They have a real chance here to take over everything..