Film is Fabulous! have a clear definition of a ‘missing episode’ (the definition has been derived by consulting with archival and media experts).

filmisfabulous.org.uk/what-is-a-mi...

The Film is Fabulous! team have received special permission to screen this item at the Blackpool Film Collectors’ Convention. We are extremely grateful to the BBC for allowing us to do so under licence.

They’ve never been on YouTube in Canada, only in the US in our limited experience. What country’s Tubi are you referencing?

Curious! No signs of it leaving here in Canada…