I of course know about the problem. It especially impacts newer, bigger-sized videos. Ive seen some videos taking up to 2 hours to being viewable.
Also at times it seems we just have not enough bandwidth with the current list of gateways as nothing is viewable.
DTube is decentralized, plans to stay like that. I am working on a solution for people to have a way to join the IPFS network and increase DTube's capacity. You can actually already do it by installing IPFS on your machine and running 'ipfs daemon' in the console then. Then go on dtube and activate the last gateway (127.0.0.1). Then all dtube files will load from your local IPFS node.
I will post more about it soon
Thanks! I can do this on my home system! I appreciate your feedback and hope to help DTube how I can, at least with content, but running a node would also help.