As an English language teacher I'm always on the look out for tools that might come in handy for teaching or delivering homework to my adult students. Have you ever tried MailVu? An App that enables you to take up to 10 minutes of video material and mail it. It's as simple as that.
Add some creativity and this tool can be used for a wide variety of activities e.g. digital storytelling, setting homework, students can practice their speaking, create authentic material for lessons to practice grammar and vocabulary, the list is endless.
It doesn't have any editing options, which would be an advantage, but you do have a self-destruct option for your videos if you're feeling a bit Ethan Huntish. Don't think it does smoke effects though. Maybe they'll put it in the next version. Here's hoping!