Which is the best video interview style?

I’ve used several different ways to record video interviews on a shoe-string hacker’s budget. I don’t have names for these video styles, maybe some video producer can reply with what they are called. Now, which technique do you think is best?

1. Pastor Kevin Doi (Epic Church) was recorded via a FlipCam fixed on a table-top tripod.

2. Pastor Seth Kim (Harvest Mission Community Church) was recorded on a Skype call via Pamela, combined with photo slide show in Windows Movie Maker:

3. Pastor David Kim (The Garden) was recorded via a Logitech QuickCam clipped on top a laptop screen with a Blue Snowflake USB microphone:
   
4. Pastor Yun Choi (New Life Community Church) was recorded via a Skype video call, with audio recorded using Pamela, and video recorded using CamStudio, combined using Windows Media Maker:
   
5. Pastor Brad Bell of The Well was recorded via this FlipCam being dynamically held by a 3rd person, in this case, my 12-year-old son: