[ashlar]

@ashlar, for the problems you mentioned, my original thought was even disabling the "Play" button in play mode, just click an item in version/extras list will play it immediately. To make the UI consistent, I enabled the "Play" button. Version management is a thing that will be done rarely, but playing is happening frequently. Why show so many buttons that won't be used when playing a video? I agree with your idea about unique UI, but management is supposed to be an advanced feature, for example, Kodi's item management menu (manage movie set/edit title, etc.) is hidden in a second level menu. I wish we could be able to do a poll or something to get more inputs for this.

For the “Manage movie version” menu, it’s used to manage version from movie title point of view, just like the movie set. The “Add version” button in version dialog is from file point of view. Are you thinking put both at the same place is a good idea? I’m not sure. Or drop the support for movie title, only using file?

The more I think about this, the more I feel that the big disconnect (for me) stems from the difference in presentation between Movie Versions and Movie Sets. When I select a Movie Set, I navigate "inside", where I see a list of movies that the set contains. I think my unconscious expectation, so far, was to have that for Movie Versions as well.

This would make the new window you created apply only to the contextual "manage" menu item (or the Versions entry in the Info window).
It would be "cleaner" and more in line with another item users are used to in Kodi (Movie Sets).

I don't know how easy/hard it would be to do it that way or if the developers agree with this, though. Or if you do, clearly :-)

(I think my idea is more or less in line with what Hitcher was describing, now that I'm re-reading it)