[wp-trac] [WordPress Trac] #51442: Cannot add youtube links since Gutenberg update to 9.1.0

[WordPress Trac]

#51442: Cannot add youtube links since Gutenberg update to 9.1.0
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 Reporter:  yeoric        |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  5.5.1
 Severity:  major         |   Keywords:
  Focuses:                |
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 Since this Gutenberg plugin update **any** attempt to add a youtube link -
 via video block, youtube block, Custom HTML iframe (iframe code copied
 from Youtube post Share function), normal link in paragraph, even just
 copying the link text into a paragraph block (without actually making it a
 link - though I suspect the editor may try to do this automatically)
 results in a json error and, in case of embed blocks, a "you cannot embed
 this" error (which I think is a follow-up error). Links to other sites
 work as expected.
 Existing pages continue to work but cannot be updated. The error seems to
 be theme- and plugin-independent.
 If you need additional information please advise how to get them. As far
 as WP is concerned I am strictly at user level, though I am a software
 engineer.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51442>
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