End to End test - Inserting WebM Video results in 404

[timarney]

Feature Description

Inserting WebM Video › should insert a video via media modal

FAIL packages/e2e-tests/src/specs/editor/media/insertWebMVideo.js (24.922 s)
  ● Inserting WebM Video › should insert a video via media modal
    expect(jest.fn()).not.toHaveErrored(expected)
    Expected mock function not to be called but it was called with:
    ["Failed to load resource: the server responded with a status of 404 (Not Found)"]

Sample test run https://github.com/GoogleForCreators/web-stories-wp/runs/7407369558?check_suite_focus=true

Alternatives Considered

Additional Context

[swissspidy]

Which URL is exactly 404ing?