Another thing with #loops server I had to figure out painfully.
I always got the error message that my video was not between 250K and 40960K big.
Spent a lot of time to increase limits in PHP, nginx or through artisan tinker. Tried a 100M video and it still complained it wasn't between 250K and 512000K.
Had to dive into #firefox developers console to realize, the error code was 422 because there was not video uploaded. Transcoding failed in browser.