Really cool that you saw dtube
video... yeah.. it is lagging and very beta. Did you check alpha.view.ly? That is the other video project which uses Steemit and a torrent video hosting solution... I saw a Full HD video there on view.ly without hickups... I did not try to upload a video on neither of those platforms though... I leave this to the professionals like you who really need a stable and trustworthy decentralized video platform.

You have to give this some time though... you are here on the bleeding edge of technology ... The stable release of IPFS (InterPlanetaryFileSystem) which is used in dtube.video is already 43 days old and in version 0.4.... I am quite convinced that soon they will iron out many problems...