All it takes to do a video is a webcam, and an article opened up for you to read on your computer. But if your'e camera shy, you can use a service like videogoround.com and have a virtual character read your article with a fairly real sounding voice.
Or simply practice, tape just one minute, go for two, incrementally increasing the amount of time with each recording. Play them back to give yourself feedback.
Just be yourself, inject your own personality into the video. Just be You. i'ts not all about information, you want to entertain them as well.
Can anyone else add to this problem?