@silverpill @linos
I see the point about compatibility with apps that do not follow the spec here.
Why would you say, it is cleaner though, to add a property only, over adding a second type?
For both cases: If I wanted to be thorough, I'd go and add this property to an RDF ontology. I'd expect the ontology to define that type and the property associated with it.
So in the end, it'd be a multi-type along with a definition of the property that is linking to a video, for example.