Video Trimming: Crash due to missing tracks property

[swissspidy]

Bug Description

Sometimes the video trimming crashes here:

web-stories-wp/packages/element-library/src/video/trim.js

Lines 115 to 121 in f9f7a09

	const tracksFormatted = tracks.map((track) => {
	const src = getProxiedUrl(track, track?.track);
	return {
	...track,
	track: src,
	};
	});

because tracks is undefined.

I have not yet found out how to get tracks to be undefined, but it is the case in this story @kkalarickal created:

https://web-stories.local/wp-admin/post-new.php?post_type=web-story#page=%2522dcf4d19c-60e4-47bc-918a-ce01c5f6cb0a%2522

We should add a data migration to add the missing tracks property and figure out why it's sometimes absent.

Expected Behaviour

No crashes in video trimming

Steps to Reproduce

1. In the story above, try to trim video on page 5

Screenshots

Additional Context

• Plugin Version: 1.25.1
• WordPress Version: 6.0
• Operating System: macOS
• Browser: Chrome

[swissspidy]

Duplicate of #12471