No support page, Video doesn't upload ... very poor#443

I recorded a video, Desktop client on Windows, v2.2.6, 28 minutes long - when I upload it, it fails - only a loading spinner. I thought that half an hour of recording was wasted. There’s no support channel or link on your site, and I don’t have a mentioned InterCom chat widget?

Support (contaxcted by mail) told me that the app has a backup feature, so my recording wasn’t lost (phew!)
But more documentation would be very helpful, in the coummunity I couldn’t find any help articles.

(edited)