There is’t any way except rsync/cp from jibri to get video file that you have recorded during conference call.
Maybe to integrate in jitsi some option to read folder with videos on jibri and make a link for downloading it.
Or to make some admin dashboard/panel with all videos that are recorder, and that admin could send download link to interested party.
I was looking for something like this as well. The link could appear in the chat like it does for skype once stop recording is clicked.
You could however do whatever you need in the finalize script that runs after recording has stopped. Upload to some server and allow users to download from that server. But it would be nice if it was a little more integrated with the jitsi meet so users can download recordings immediately from the jibris local folder, once recording has ended. This would probably have to be a config though.