I built my own homebrew videocam and only have about $250 in it. That is with the $50 Sony videocam from ebay and an IR array. Of course you have to buy an extra camcorder battery, a couple 12 volt sla batteries and charger for the array, and a couple tapes.
This was the first year with the video and i found it to be very interesting.
The advantage of these over a trailcam picture is that you can see and hear alot more of the deer behavior than with a picture. I was amazed at all the grunting and vocalizations i could hear from some of my videos. The microphone picks up everything.
Here is a couple sample videos i took this fall. Sorry dial up users, these are some bigger files.
This first one is of a smaller buck standing on a scrape. He moves out of the way when a bigger buck comes in.
Video 1
This next one really Pi$$ed me off. I realized after i got the tape home that the videocamera was accidentally zoommed in too much for about 2 weeks, and right during the best couple weeks of scraping activity. Decent buck, brisket view. You can see it's a nice buck, just can't see all the rack at once.
video 2