You can watch it directly from Lemmy. The two softwares have good federation as long as your instance doesn't block it, open the channel as a community and follow it to ensure smooth fediversion of future content video as post.
Past content won't load automatically, you'll need to copy the link for the video you want to watch in the search bar of your instance to access it.
For Jerboa speciafically, Idk. I'll ask around. On the website it is normal to have an error page, After a minute and a refresh, the Channel is accessible.
Let us say that I want to access the podcast "Surveillance Report" that I know to be on Peertube. I find the channel local URL:
apertatube.net
Moi/c/surveillancereport/videos
I want to access it from my local Lemmy instance: slrpnk.net
So to access from my instance, I should go to the following URL: slrpnk.net/c/[email protected]
First Lemmy send back an error. But After a minute and a refresh, I have access to the channel as community free of any video.
As long as I subscribe to the community, I will received new video as a post.
For the older video, I'll have to find their local URL, for example: https://apertatube.net/w/wbgPHum1TApd7cVYevs1Ri
And search for it into the internal search tool of my instance.