1.)WRONG FRAME RATE
Most digital video cameras will default to 30 frames per second which is a standard setting. While most video happens at this frame rate, film/movies shoot at 24 frames per second. It’s a subtle change imho but if your camera will allow for it, it’s worth a try. If you are using a web cam, or a cell phone, you may not have the ability to change this setting, but it’s worth a look to see if you can change it.
2.)WRONG SHUTTER SPEED
If you are using a DSLR or handy cam, you can adjust the shutter speed on your camera. The shutter speed is just the rate at which the camera opens and closes to let in light. This setting can impact that image being recorded. A good rule of thumb is to use a shutter speed double the frame rate of your camera. So if you are shooting 24 FPS, adjust your shutter to 48 FPS.
3.)WRONG WHITE BALANCE
Any DSLR or Handycam will have a white balance seting. This is the setting that controls where the white point is on what is being recorded. If it’s set wrong, the color of your images will be thrown off. You can manually white balance by using the white balance setting in your camera and pointing it at something white like a piece of printer paper. If you are using standard ligh bulbs, you can set your white balance manually to 3700k if you are using studio lights, set it to 5000k. Most cameras default to auto exposure. If you are shooting on a web cam or cell phone, these settings may or may not be available but it’s worth checking.
4.)WRONG EXPOSURE
If your camera is set to auto exposure, it may fall apart when light hits your subject. If you notice that areas are blown out and pure white in your frame, then it’s over exposed. Exposure is measured in ISO. You can go in and set your ISO manually to see how it looks (if supported). Then make sure the light is casting down so the shadows are on the floor and not on the wall behind the subject.
5.)BAD LIGHT
Lighting is always important. You can get a set of LED video lights for a couple of hundred bucks on amazon. But you can also grab some work lights from home depot. Softer light always looks better so you may need to grab some diffusion gels and tape them to your lights to soften it up.
6.)BAD COLOR SETTINGS
Messing with your color settings can get you in trouble. Unless you have some experience with it, it’s probably best to just leave these alone unless you are going to do some color correction during your editing process.
7.)LOW QUALITY SETTINGS
Try to use the maximum resolution and frame rate for your videos. You can always down scale it later. Use a high bit rate if possible.
8.)SHOOTING AT THE WIDE END OF THE LENSE
Shooting with a wide angle lens causes lense distortion and a “fish eye” effect. Some folks use these due to a small shooting space and not having enough room to put the camera far enough away from the subject. In some cases, it’s just not possible to get the camera far enough away and you will have to use a wide angle lense, but avoid it if possible and put your camera further away from the subject.
9.)ASSUMING IT”S THE CAMERAS FAULT
It’s rarely the cameras fault. It’s usually operator error.
10.)SMALL SENSOR CAMERA
Most folks use a cell phone to shoot video. These have very small image sensors which typically don’t look as good as a nice DSLR with a big image sensor with a large piece of glass in the lense. Go pros, and other smaller cameras will never look as nice as a good DSLR with decent glass on it.
11.)ASSUMING YOU NEED A BETTER LENSE
The stock lense on a DSLR is plenty. You don’t need to spend tons on expensive glass for your camera.
12.)BAD COMPOSITION
No matter what you are shooting with, if your composition is bad, the shot is bad. The shot should look interesting. Focus on what is most important in the frame. Dead center, straight on can look very boring. Fill the frame with something worth looking at.
13.)NO FLIP SCREEN
Some cameras have no flip screen so you can’t tell what you're shooting. Go pro/etc. Can make your life much harder since you cant see what you are doing unless you hook up some sort of video monitoring solution. A simple flip screen can save a lot of problems.
I hope these are helpful
Here is the screaming man himself talking about these issues.