update(MotorTrendIE): #7680 _VALID_URL

[AmirAflak]

Description

updated Motortrend url

Fixes #7680

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

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What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)

Copilot Summary

🤖 Generated by Copilot at b565160

Summary

🚗🔗➕

Updated MotorTrendOnDemandIE extractor to support motortrend.com/plus URLs. This expands the coverage of the extractor for Motor Trend videos.

_VALID_URL grows
to match more Motor Trend
plus videos. Fall.

Walkthrough

• Update the URL pattern of MotorTrendOnDemandIE to support more domains (link)

[bashonly]

add a test for the new URL format