[wp-trac] [WordPress Trac] #56320: Update mediaelement.js to the latest version

[WordPress Trac]

#56320: Update mediaelement.js to the latest version
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 Reporter:  desrosj                  |       Owner:  adamsilverstein
     Type:  defect (bug)             |      Status:  assigned
 Priority:  normal                   |   Milestone:  6.6
Component:  External Libraries       |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  good-first-bug has-      |     Focuses:  accessibility,
  patch needs-refresh needs-testing  |  performance
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Comment (by adamsilverstein):

 @coquardcyr - thanks for working on this.

 I gave it a test and noticed some initial issues we need to resolve.

 To test this I would up uploading an mp4 video file and an mp3 audio file
 to my page, and embedding them using shortcodes (instead of the block
 editor which inserts native `video` and `audio` html elements). I did this
 in the code editor view in Gutenberg (screenshot incoming).

 The audio player loaded and worked as expected. The video player worked
 and loaded, however it seemed to missing part of its UI (see screenshot).
 One file seems to have failed to load "mejs-controls.svg" that is likely
 the issue.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56320#comment:16>
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