Yahoo has updated Yahoo Messenger aap which allows users to make video calls on iPod Touch 4. Just few days back Yahoo released an update of Yahoo Messenger for iPhone 4 with the feature of video calls over 3G between iPhone and computer.

Yahoo Messenger for iPhone and iPod Touch 4 New Features
Enabled video calling on iPod touch (4th generation)
Bug fixes

Grab free Yahoo Messenger for iPhone and iPod Touch 4 via integrated iTunes link.

Download Yahoo Messenger for iPhone and iPod Touch 4