chore: update test_video.py

[eltociear]

What kind of change does this PR introduce? minor fix

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• [ ] My code follows the style guidelines of OpenAdapt
• [ ] I have performed a self-review of my code
• [ ] If applicable, I have added tests to prove my fix is functional/effective
• [ ] I have linted my code locally prior to submission
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation (e.g. README.md, requirements.txt)
• [ ] New and existing unit tests pass locally with my changes

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