Hi there,
please find attached a document with a proposed workaround in order to allow displaying videos hosted by platforms such as wistia and bunny.net when the domain restriction security settings are enabled.
This has been discussed several times in this forum and we are going to try to find a generic solution (hopefully working out of the box), this is the related issue: https://tracker.moodle.org/browse/MDL-60264
Regards, Juan