Media elements require special handling in :remove()

[gwarser]

Because [by the spec] they are supposed to play the audio even after removed from the DOM

Media elements that are potentially playing while not in a document must not play any video, but should play any audio component. Media elements must not stop playing just because all references to them have been removed; only once a media element is in a state where no further audio could ever be played by that element may the element be garbage collected.

https://stackoverflow.com/questions/50937026/why-does-a-video-stop-playing-when-removed-from-the-dom-while-it-can-still-pl

For: https://www.reddit.com/r/uBlockOrigin/comments/1bs7vd6/im_having_a_war_with_the_twitch_front_page/

[Yuki2718]

I thought if a video autoplays it must be muted. But maybe $permission?

[gwarser]

After interaction with a page, video can autoplay with sound.

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Or a case when player is moved on page (miniplayer) - desired when displayed as main, not desired minimized to the corner of page.