[CI/Build] Update video URLs for testing

[DarkLight1337]

Purpose

The previous videos used in the test are no longer accessible. Update to use OpenCV samples which are publicly accessible.

cc @khluu can you add these videos to our AWS bucket and open another PR to update the links so we won't run into this issue in the future?

Test Plan

Test Result

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Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[gemini-code-assist]

Code Review

This pull request updates the video URLs used in tests, as the previous ones were inaccessible. The new URLs point to OpenCV samples, which is a good improvement. However, one of the new URLs is from a personal blog, which could be unstable and cause test flakiness. I've suggested replacing it with another video from the official OpenCV GitHub repository to improve the reliability of the tests.

[AndreasKaratzas]

This PR should be good to go once rebased with current main. Issue was resolved by: #34447