> It's unclear what their motive is for not supporting them.
What's unclear? They want to monopolize the market for smart phones, or at least hurt the competition and splinter the market. Clear as day: they are not good citizens, they are a publicly traded company with a fiduciary responsibility to maximize return to their shareholders.
Play in Chrome (Mac/Win/Linux/Android) and Firefox (Mac/Win/Linux/Android) but not Safari (Mac/iOS).
Here's a few more
https://commons.wikimedia.org/w/index.php?search=webm
I would be nice if Apple would support open standards. It's unclear what their motive is for not supporting them.