This fixes a minor issue in the website editor test suite by ensuring test page content is properly cleaned up after a save test. It helps keep automated testing reliable and prevents one test from affecting later checks, with no direct impact on end users.

I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

This fix ensures that when a website editor adds a background video, any previous background image is properly cleared. It helps prevent unwanted visual overlap or outdated imagery from appearing on published pages.

I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr