Adding "home" videos in Catalina

I am trying to set up Homesharing to an Apple TV (device) on a friend’s Mac running Catalina. I have numerous videos on an external drive and have made sure the Apple TV (app) settings do not copy the files to the Mac. I have used “Add to library” to add a couple of the videos to Apple TV app and they appear under Recently Added. However when I “Get info” to change the type of video and name the TV show the app locks up. I have to force quit the ATV app.
Has anyone successfully added videos from an external drive in this way and managed to change the video info?
I have been doing this in iTunes for years. Has Apple dropped the ball (again)?