Yes, the apps are now available via cydia. Anyway, they are only trial versions, and you will need to pay if you want unlimited video recording, and some features of the camera available.
With iphone video recorder, you are able now to record video with the camera of your iphone at 15fps. It Has something that i hate, when you finish recording the video, you have to wait about 10 minutes until it compresses. Anyway, is usefull for an emergency. Snapture now comes with some new exciting features. You can zoom the camera as the same way as your photos (with 2 fingers) and if you buy the complete version, you will be able to make more things, like previewing images without exiting snapture.
Well, you need a jailbroken iphone, and that´s all. isn´t it easy? go to cydia and install them now!!