Is there the possibility to implement Wistia in the Jupiter theme just like Vimeo already is?
Unfortunately there is no such option in Jupiter.
I will add you request to the featured request so our developers may add this functionality in future updates if there are more request or they see it fit.
I would also like this feature.
It would be great if we could use Wistia videos for page backgrounds.
Please add your request at the below link by creating a new topichttp://forums.artbees.net/c/jupiter-user-requests/add-your-requests-here
If the request is suitable and gets many votes, our dev team will consider adding it.