Shortcode: Fix broken Youtube URL on Classic Editor

[arthur791004]

Fixes #46409

Proposed changes:

• Let's try to enable wpcom_youtube_embed_crazy_url_init for non-REST API requests

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Apply changes to your site via Jetpack Beta Tester
• Create a new post with classic editor
• Add YouTube URL
• Adjust the alignment
• Save the post
• Ensure the result looks correct on both editor and frontend
• Create a new post with block editor
• Add Embed YouTube block
• Adjust the alignment
• Save the post
• Ensure the result looks correct on both editor and frontend

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WoA dev site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin (Jetpack), and enable the fix/youtube-embed-link branch.
• To test on Simple, run the following command on your sandbox:

bin/jetpack-downloader test jetpack fix/youtube-embed-link

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

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---

Follow this PR Review Process:

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Jetpack plugin:

The Jetpack plugin has different release cadences depending on the platform:

• WordPress.com Simple releases happen as soon as you deploy your changes after merging this PR (PCYsg-Jjm-p2).
• WoA releases happen weekly.
• Releases to self-hosted sites happen monthly:
  • Scheduled release: February 3, 2026
  • Code freeze: February 3, 2026

If you have any questions about the release process, please ask in the #jetpack-releases channel on Slack.

[Copilot]

Pull request overview

This pull request aims to fix a broken YouTube embed link issue by modifying how the YouTube shortcode filter is registered. The key change removes a conditional check that was previously used to determine when the filter should be hooked.

• Removes the conditional jetpack_shortcodes_should_hook_pre_kses() check before adding the pre_kses filter
• Adds a changelog entry documenting this bugfix

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
projects/plugins/jetpack/modules/shortcodes/youtube.php	Removes conditional wrapper and unconditionally registers the pre_kses filter for YouTube embed conversion
projects/plugins/jetpack/changelog/fix-youtube-embed-link	Adds changelog entry documenting the YouTube URL fix as a patch-level bugfix

[Copilot]

The word "Youtube" should be "YouTube" (with capital T and capital B) to match the official brand name and the naming convention used throughout the codebase.

Suggested change

	Shortcode: Fix broken Youtube URL
	Shortcode: Fix broken YouTube URL

[jp-launch-control]

Code Coverage Summary

Coverage changed in 1 file.

File	Coverage	Δ%	Δ Uncovered
projects/plugins/jetpack/modules/shortcodes/youtube.php	161/257 (62.65%)	0.48%	-2 💚

Full summary · PHP report · JS report

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.