I've been doing research on this exact category myself (after having previously had some modest success on the image editing side.) You're severely underestimating the number of competitors. Try searching the relevant app stores instead of Wikipedia (why would you ever even check here?).
I think parent was complaining that there's very little public information (particularly hard numbers) about the incumbents. GP was cruising Wikipedia for information about the apps' parent companies rather than just trying to identify the apps.
It's easy to see how many apps are in the store. It's a lot harder to know how much money they are grossing.
Right, I was making the point that there should be more info online about the entire mobile video editing app market (one example). I know there are many such apps in the stores.
