Right… that’s why I have supplied *both* the mp4 and webm in the same folder per your documentation. However, I really don’t want the webm version of the file to distract from the point of the ticket… so I’ve removed the webm version. Now, there is only MP4 and it should work… but it does not.

There is a genuine bug here in Safari on Mac (Yosemite). Does anybody on your end have a Mac to confirm? Otherwise there’s no way on your end to resolve.