Thanks for everyone’s help. I have been playing with iframes as that seemed easiest, but getting them to appear as the same size as the Video component proved difficult. In some cases the videos would start to play automatically, as I’m linking to files rather than YouTube.
I had a quick look if anyone else had used the COMPLETION_VIDEO_COMPLETE_PERCENTAGE setting, and it seems like you still need to press play to trigger the completion.
I’d love it if there was a way to turn off video grading completely as it’s a headache.