I have a complex library where I use "title" to show the exact name of the movie. I sort with "album". e.g. James Bond 01; James Bond 02 or Pirates of the Caribbean 01; Pirates of the Caribbean 02 etc. to have those displayed together. I use a separate root entry (left) for TV Series (and animation, music, DVD (physical) Blu-ray (physical) etc.). Also I have "Total Video Library" which shows everything, also the entries I made for my physical DVD's and Blu-ray. I prefer to see all episodes separate so I can choose the episode I want to see more easily. Normally I wouldn't mind to see separate parts but these specific files are only 1 or 2 minutes long.
Maybe I will make a separate entry under the video root for those demo files and test files. That way I can choose "Album Thumbs" and give the album the same name.
I do use series and season for tv series and e.g. Batman; Bond; Millennium Trilogy movies, to keep them together in the library.