[runroader]

Safari vs. iOS Safari is a distinction that needs to be made and people need to keep in mind. Apple's a lot more likely to allow stuff in desktop that it won't even consider for iOS. I mean your own link for media source has it being fully supported since 2014 in desktop Safari.

[foota]

Maybe I'm wrong, but I think mobile safari is most safari usage.

[fomine3]

Technically true but is it mean anything? Support on iOS Safari is the important thing.