Excuse me, but I told to use Froala in the case of shared videos like from Youtube. This app doesn't influence on the video upload. About your trouble - did you install / setup Cron Jobs command? It can be checked by the line like in the Server audit:

Last cron jobs execution - 10 Feb 2019 9:44:01 pm

If the date isn't far from actual then it works fine - if not, then you need to correct it according to the step 4 form this manual:

https://github.com/unaio/una/wiki/Installation