Eventer / Vimeo -> Youtube Migration

We have videos from our events spread across 3 services at the moment: Eventer, Vimeo and YouTube. Eventer is shutting down in a few months. We should bring all the videos together into the YouTube account.

I guess the task is pretty clear, I can do it. Created task https://trello.com/c/Rt0rgKnh/54-eventer-vimeo-youtube-migration