I've been trying to upload the one of the hackathon talks to commons for days and I haven't been able to.
With video2commons the upload failed consistently:
And using Upload wizard I get the same result.
The video is the original mp4 1080p 1,130,715KB (see on youtube, which I uploaded to video2commons, which converted it to vp9 and tried to upload.
I ended up doing the conversion myself as well to webm vp8 locally, resulting in a 800,987KB video file, which I tried multiple times on Upload wizard to no success.