Fix AssetVideo

[jprochazk]

What

Fixes https://github.com/rerun-io/rerun/actions/runs/10667949540/job/29567116641

I'm going to start running full-check on PRs that change types more often...

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

• PR Build Summary
• Recent benchmark results
• Wasm size tracking

To run all checks from main, comment on the PR with @rerun-bot full-check.

[jprochazk]

@rerun-bot full-check

[github-actions]

Started a full build: https://github.com/rerun-io/rerun/actions/runs/10668428533

[jprochazk]

Good: https://github.com/rerun-io/rerun/actions/runs/10668428533/job/29568650286

[jprochazk]

Yolo-merge to unbreak main