A Vintro should be kept to around 30 seconds...
It should include the following:
1. Your name
2. Your profession or job title
4. Work experience summary
A Vintro can be easily recorded on a smart phone, tablet or laptop camera. Employers aren't expecting a Steven Spielberg production and are more interested in seeing how you present yourself. (How you present yourself is how you'll represent the company!)
Using editing software to crop the Vintro and remove any bits at the start or finish where you might be setting up the camera or stopping the recording is a great way to give your Vintro a polished finish.