Hey buddy, just seeing this now and I'm having a similar issue. It uploads fine but during the "Creating Sprite" and "Adding Sprite to IPFS" section, it just stops uploading, without an error message.
I'm still working on a solution and if I find one I will post it here. Good luck to you, and did you manage to find a solution?
Maybe this is ri-donk-ulous but I typed in 4 hashtags, uploaded the snap, and then clicked Sumbit ...and it worked. Don't know if this will help you, but my videos are working now. Best of luck to you
Thanks for the tips! If i have anymore issues i will give them a try. As for my original post, i never really found a solution for the failed uploads, but now that DTube has released the 0.7 update i haven't had anymore issues. Maybe they just needed to work out some bugs =)