You’re right that it’s slow, but it’s unfair to compare the system to current YouTube when the Dtube uploader is hosted and paid for by a single guy.

If you’re willing to invest some time though, you can encode your videos in the right resolution and format yourself and then also upload the files to the IPFS network yourself. Then you only have to paste the links to the files in the advanced section of the dtube uploader and can bypass the entire thing.