My Take
Overall, I think this tool isn't the best for teaching, but can be very useful for some subjects as a quick lesson. I think it's good that the videos are short because it may be able to keep up with a short attention span and still get an important point across. At the same token, since it's so short, you can't teach much in that time frame.
How I Use It
I would use this tool for teaching short lessons on a certain subject. Since the app only allows 1-3 minute videos as the longest option, you can make some short and clear points to get across to students and they might be more engaged with this format.