I think I was one of the very first to use a cam to capture the hunt.
One thing you have to remember is your battery life, and the quality of the video. The higher quality the less battery time. If you only hunt for two hours that is fine, I think the Go Pro is rated at about 2 hours run time and by far the best video of all. Me, I like strapping on the cam, Velcro and going out for many hours, I use a old faithful cam I have had for several years, Tachyon XC, it records up to 8 hours on two rechargeable AA, video is very good if it is sunny, shady is fair, vid is 640 x 480. It's 100% water proof, captures the audio of the detector because it is mounted to the headphones. I find a good target I just put my hand in front of and blank out the vid/light to the cam, this makes it a lot easier to edit several hours of video. Also I do like hearing the audio of the detector, after a long hunt it's really hard to recall details and the audio of the detector is very important.
https://www.youtube.com/watch?v=WNlHyDVyVwI