When creating a passage, it is possible to "Import from YouTube".
However, when you EDIT a passage, there is no mechanism to add a YouTube video link to a passage without one nor replace an existing link. (work around: re-create a new passage and copy all the data over and delete the old one.)
We discussed this, and we'd rather not implement because it adds some complication, but if you have a list passages you'd like us to fix manually, old links vs new links, we can do that for you. If it's private feel free to message me.
In the Philippines now.
No problem, I'll just recreate the old ones. There aren't too many.
Thanks for considering it!
