Enhance Bilibili video support (redo of #2522) (#2599)

* Enhance support for bilibili videos in responsive video helper, and add corresponding doc

* Apply @iBug's review in mmistakes/minimal-mistakes#2522

* Fix danmaku in page hero video

* Update video to use case..when for iframe src

* Update CHANGELOG and history

Co-authored-by: Anran <51769728+ALeafWolf@users.noreply.github.com>
Co-authored-by: Michael Rose <mmistakes@users.noreply.github.com>

Update video (#2512)

* Update video

support bilibili video

* Update video

drop the duplicated <div> wrapper

* Update video

update video

Add Google Drive as video provider (#1967)

Use privacy aware embed options for YouTube & Vimeo (#1964)

fix(includes/video): use https always (#945)

closes #944

Merge branch 'release/4.2.0' into develop

Add page hero video for vimeo/youtube using embedresponsively.com code (#788)