Hello Tony 
 Yes, Wikipedia has a definition of "short film." A prime thing re "video short" though is that enormously more people use video for productions than film. Even bigtime movies are now partly made with video, not film. Things we see on the I'net are video - 99% of what we see on YouTube is produced in video, not film. I mentioned before some stuff I'd written re "video short" - haven't sent it, but here it is. This will broaden perspective on present-day short videos: 

 • Video short 

 Video shorts are typically 3 to 15 minutes long, usually professionally or semi-professionally made. Video shorts commenced in the 1960s - many for business, education, documentaries, and TV news, also for video competitions. Video shorts are computer edited. Corporations produce video shorts to let people know about the essence of their products. Online businesses have started moving ahead with video shorts, not just with commercials but also for specific products and services. The shorts can also be promotional and educational.  

 There is a difference between video shorts and video clips. Scenes are usually shot better for video shorts than for video clips; clips are usually by amateurs. Cameras are often hand-held when shooting clips, making scenes bounce around; locations usually aren’t bouncing around though. For video shorts, skilled camera people often use a tripod with a dolly, or a Steadicam, to smoothly move the camcorder closer to subjects for steady images. On the other hand, people making video clips usually get closer or farther from what they’re shooting by “zooming” in and out rather than moving the camera closer to or farther from main subjects. 

 Corporations now produce video shorts for their websites. People usually prefer to watch videos about companies rather than just read about them. Of course, videos raise the number of people going to websites. TV stations, as well as national networks and websites, also produce video shorts for broadcast and for the Internet. Video shorts tend to be more serious than video clips. Also, carefully produced music videos are video shorts, not video clips. 

 A chief value of short videos (video shorts and video clips) is that people generally prefer not to watch long videos on the Internet. Shorts effectively convey essentials of products, services and happenings, etc. Long videos and movies, on the other hand, are typically watched on TV and DVDs. Video shorts on the I’net show issues, products, and happenings, also views of past, present and future. Video clips typically show brief events, occurrences and funny things. Both video shorts and video clips, being relatively short, often expand knowledge of things beyond text. 

 • Video clips -  (Wikipedia now has this definition) 

 In comparison, “video clips” are often relatively amateurish. The term “video short” came out before “video clip.” A video clip is defined as “a short clip of video recording.” Clips sometimes show surprising events - unexpected happenings and consequences, but they are generally informal. Video clips are primarily viewed on the Internet. 

 Video shorts became common in the 1970s and were usually professionally made. Video clips took off in 2005, mostly on YouTube. Most of what’s on YouTube are clips made by amateurs. Some clips are portions of relatively long productions - short extracts from movies or television programs, often funny happenings and events. Video clips are generally “non-serious.” Most clips are made by amateurs - about 80% of what’s on YouTube are made by amateurs. 

 Very much look forward to your response on this. I think "video short" is unquestionably a real "category" that needs to be known/accepted/used. Thank you much. 

 Mike Cady