When uploading a video to VideoPress via the three methods listed at https://jetpack.com/support/video-hosting/#uploading-videos the upload is assigned to User ID 0, meaning no author is attributed to it:

When videos are uploaded to WordPress normally _without_ VideoPress, they are properly attributed to the user who uploaded them:

Also reported here:
https://github.com/Automattic/sensei/issues/2128
And in #10536
If I am right JetPack API doesn't use Author ID. Therefore it is set to 0.
We are waiting to be fixed. :)
We received another report of this issue. Any update or anything we can recommend in the meantime?
I am afraid we have made no progress on this just yet; the latest can be found here: pxWta-N4-p2
anything we can recommend in the meantime?
If this conflicts with the Sensei plugin, this can help:
https://github.com/Automattic/jetpack/issues/10536#issuecomment-435899602
If this conflicts with another plugin, I am afraid there is no workaround right now.
Thanks, Jer! It doesn't appear they're using Sensei in this latest report (1886029-zen for reference).
also reported in 2071225-zen
User in 2071225-zen noted:
This wasn’t an issue until a day or two ago, users were being assigned to videos without a problem. Why has it all of a sudden changed?
Double-checking on this point as this thread seems to indicate it never worked correctly when it comes to assigning a user.
This issue has been marked as stale. This happened because:
No further action is needed. But it's worth checking if this ticket has clear reproduction steps and it is still reproducible. Feel free to close this issue if you think it's not valid anymore — if you do, please add a brief explanation.
Reported in 3184332-zen
Also requested in 3195898-zen - user cancelled their plan because of this.