Hi @Alden Kollman
I find 2 similar thread you may have a look:
https://www.mrexcel.com/board/threads/insert-mp4-video-into-userform.838793/
https://www.mrexcel.com/board/threads/userform-embed-into-frame.1021192/
(Please Note: Since the web site is not hosted by Microsoft, the link may changed without notice. Microsoft does not guarantee the accuracy of this information.)
As this issue is related to VBA code, I added the "Office Development" tag.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.