Despite the explanatory text, this app is indeed ready to download for iPad ($0.99). This is a nice use of technology to explain other technologies. You go through a browser screen to a Website, then draw on the iPad screen to demonstrate functionality while the app records what you do. Publish to Evernote or YouTube. You will have to do your own audio over, however. What a cool app.
Mailvu is a free video messaging system that looks simple and easy to use. R. Stannard's video helps you get started quickly, and he also discusses how he uses the tools with his students for language learning: you can have students send you video recordings and then comment on them, have students do interviews of each other, describe something, talk about a holiday or their weekend, etc. Mailvu also has apps for Android and iPhone.
Very short videos--36 sec--may be good for low level students to practice initial speaking/listening. Also has apps for various smart phones. Might be good for a quite pronunciation quiz, for example. The teacher can then send back a short video message with corrections, modeling, etc.
A video on how to use Keek to make and share short video messages. Although limited to only 36 secs, this might be a good application for beginning learners, or for a quick pronunciation quiz (you will see who is taking that quiz!) You can also embed a finished recording in your blog or wiki, as well as sending it by email. A good way to have students create a short, practiced conversation. Also has smartphone apps for mobile recordings, RSS feed to follow, and links to Facebook and Twitter.
"Plays on most smart phones. Video mails up to 10 minutes. Video stored up to 365 days. No account or downloads." This would e fun for students to use to practice speaking and presentations. Especially good because there is no sign-in. See Russell Stannard's training video at