Most things I watch online are originally released on specific streaming services. But sometimes, a film is released on multiple platforms simultaneously, and is not owned by any of the major streaming platforms. Sometimes a movie that is released originally on a specific platform may later be released additionally on other platforms, and sometimes the opposite occurs; a film may be released on multiple generic streaming platforms and later be released by a specific platform such as Hulu or Disney+, for example. Also, films that are originally released either theatrically or direct-to-video (and sometimes TV movies) are usually later released on VOD platforms, but of course I won't be listing those here, just the ones that are originally released on multiple digital platforms.
stuff I've seen:
Sea Fever
A Sudden Case of Christmas
stuff I haven't seen: