VideoPress: Change the default for the "usesAverageColor" setting to True

[jgcaruso]

Fixes # 1104-gh-Automattic/greenhouse

This PR changes the default value for the "usesAverageColor" setting (appears as "Match video" under the Progress Bar Colors menu) to true from false since now that its been tested manually for a while we want to make the default behaviour.

Changes proposed in this Pull Request:

• Default value for the usesAverageColor changed to true
• Deprecation created since this changes the url of the video embed that gets created

Jetpack product discussion

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

Nope

Testing instructions:

• Don't apply the PR yet
• ensure jetpack is built jetpack build plugins/jetpack
• Create a new /video block and ensure the Progress Bar Colors -> Match video setting is disabled
• Create another new /video block and turn on the Progress Bar Colors -> Match video setting
• Publish the page
• Checkout this branch
• rebuild jetpack jetpack build plugins/jetpack
• reload the page
• Both players should render correctly without any errors
• Create a new /video block, the Progress Bar Colors -> Match video setting should be on be default

[matticbot]

Caution: This PR has changes that must be merged to WordPress.com
Hello jgcaruso! These changes need to be synced to WordPress.com - If you 're an a11n, please commandeer and confirm D74216-code works as expected before merging this PR. Once this PR is merged, please commit the changes to WP.com. Thank you!
This revision will be updated with each commit to this PR

[github-actions]

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Jetpack plugin:

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[roundhill]

Tested well! Thanks for dealing with the deprecation stuff 😵‍💫

[jeherve]

this tests well for me. 🚢

[github-actions]

Great news! One last step: head over to your WordPress.com diff, D74216-code, and commit it.
Once you've done so, come back to this PR and add a comment with your changeset ID.

Thank you!

[jgcaruso]

Changeset ID: 239672