Dropbox has been a life saver for me with my 8th grade science kids. We do a weather photo project and they must digitally send it to me. Well, the photo projects are usually too large for email so Dropbox to the rescue. This product is one that both teacher and students can use. Perfect for collaboration as others can edit what you share with them. A similar product would be Google Drive.
I had no idea you could do this with videos! I think this would be a very useful tool in the classroom. I have often times gone through a video and picked out specific spots I want to show my students, so I ended up having to write down those exact times so that I would know where to skip to. This tool would be very helpful with that. I think this resource would be mostly used by teachers to share videos with students. I have not seen anything like this for videos. I recently heard of a site that you can copy the youtube URL in and it takes it to a place where you don't get all of the advertisements on the side. Which is nice because those aren't always the most appropriate for school.
This would be great for a flipped or blended classroom. Teachers could use this to edit videos and incorporate them into lessons as well. Students could also do this if they are presenting information and want to use a piece of a video. EdPuzzle is a similar resource that can do the same kind of thing.
This site allows you to make effortless videos and share them with others. The site does the editing for you and creates a very professional looking product. You can stitch together almost any image or video clip making it great for story telling.
Animoto is a great tool for sharing pictures and video. It makes very professional looking videos. Teachers can sign up for a free premium account that they can renew every year.