[playlist] shortcode not rendered on editor instances not related post content

[marcochiesi]

When using a wp_editor instance not related to a post (i.e. using the visual editor for widgets as provided by ​Black Studio TinyMCE plugin, the [playlist] shortcode is not rendered correctly inside the editor.
This depends on the function ​wp_ajax_parse_media_shortcode which checks for a valid post ID, but for such editor instances the post ID is set to 0 in the ajax call, so it returns false.

[iseulde]

Some media shortcodes rely on the post global, so I'm not sure what to do with this. @wonderboymusic? :)
Should these shortcodes work outside a post context?

[wonderboymusic]

In 31201:

In wp_ajax_parse_media_shortcode(), don't require a global $post for all passed shortcodes.

embed is the only shortcode that requires a post ID. This will allow MCE views to work for playlist, audio, and video outside of the Edit Post screen.

See #30835.

[Funkatronic]

Why does embed require post, anyway?

[iseulde]

It relies on cache bound to a post ID.

[wonderboymusic]

Fixed in [31201].