How do i create a viedo

Go into Photo Booth
Red 4 pictured looking app like the photo attached! If you cannot find it, go to the top right hand corner and search for it.
Now that you have photo booth open, you will need to make sure the green light of you mac camera turns on when the app opens, (running other photographic programs in the background or webcam sites will stop your camera until closed) and out of the bottom row of buttons/options on the app (second picture) you will need to click on the 3rd button on the left, the two separated frames, and once you have done that the red button will turn to a videocamera instead of a normal one, and you can begin recording videos on your mac with special effects, etc. :)