Due to unforeseen changes in UK law concerning sites providing access to certain kinds of videos (which I don't have time to fully investigate), I have become reluctant to spend time developing and promoting this project, and have now decided to close the site over the next few days.
It has received minimal traffic (perhaps due to my lack of promotion), and with no immediate monetisation strategy, maybe it wasn't such a good idea as I had initially thought.
I still have some interesting thoughts for developing the site, but don't wish to put my business at risk by doing so.
The site is based on an open source project, which you can find here on GitHub, and I'd be pleased to see somebody running it - or some derivation of it - in a more permissive jurisdiction.
My apologies if you supported the project, or are one of the few who was using multi.tube.
Please contact me (@andybets on steem.chat or discord) if you would like any help in getting the steem video aggregator up and running on your own server.