This update completes leftover cleanup from a broader date handling migration across several Odoo apps. It keeps underlying views and website data aligned with the new approach, reducing maintenance risk without changing day-to-day business workflows.

odoo/odoo#221348

The Knowledge and Web Studio areas were updated to use the new video permission setting behind the scenes. Users can still add videos in Knowledge through the existing embedded media flow, so there is no expected change in day-to-day behavior.

This commit adapts code to the replacement of the
`allowMediaDialogVideo` option with `allowVideo`.

For the knowledge module, inserting video will still be available (only) via an embedded component, so no functional changes are introduced.

task-4384948