[whatwg] Scripted <video> query proposal

[Maik Merten]

Perhaps another possibility would be something similar to the current
navigagor.mimeTypes array (navigator.mediaMimeTypes?). Absolutely
old-school, but perhaps makes sense, as the ability to display certain
media types is mostly a property of the "navigator"/client, not as much
a property of the media-element (all media elements would most likely
return the same media types, indicating the property may be located
elsewhere).

Anyway, I welcome any scripted query support. All proposals on that
topic are better than a dark age of poorly maintained black- and whitelists.

Maik