Able to Upload Video to WordPress Form Manager?

I’m testing out WordPress Form Manager to see if it would be a good fit for a submission form for a competition we are hosting. We need unregistered users to be able to upload video clips via the form and the ability to limit the type of video. I noticed that this plugin is not letting me save a list of video file types to the “only allow” field. It does let me save a list of other file types.

Does anyone know how to edit the Form Manager plugin to allow nonregistered users to upload video and limit the filetypes to .mp4, .avi, .mov, etc.?

If not, does anyone have an alternative plugin suggestion? I tried CformsII, but the upload times out. (I have increased the upload limit and post limit in the php.ini file, so the problem isn’t the upload size but the amount of time it takes with CformsII.)

Any help would be greatly appreciated!