system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are video cameras used for television production so much larger than consumer based ones?

Whenever I see behind the scenes footage of a reality TV show the cameras they use are quite large shoulder mounted beasts. Whereas, the video camera I have is handheld and produces HD video exceptionally well. What extra "stuff" is inside these huge cameras and how does that make them superior?
gpt
Bigger lenses and sensors. The focusing system is a lot more precise than a home model, they have better image stabilization, it also takes up more room with bigger motors and that kind of thing. This is going to be the biggest difference in size. They want the best image quality so they build it with a lot more processing capability. Instead of one chip doing three things, they have 3 chips doing 3 things very well. You might not notice the image quality difference between a professional broadcast and your camera if you aren't looking for it, but you are watching a compressed, scaled down version of the video they really record when watching at home, you would notice a difference side by side for sure if they decided to broadcast your video. Storage is important so the cameras have flash memory and sometimes conventional hard drives, and they are both a lot bigger than an SD card. Some still take digital tapes too. And you want a button for important things like white balance, exposure, iso, fstop, focusing, no going through a menu for that sort of thing. They have much better preview screens. High resolution, high contrast, very bright. Also, those cameras have wireless mic capability and even wireless transmission capability to a news van, for example. And the batteries to power all of this stuff need to be a lot bigger than a DSLR to get comparable life from them. That is the step you take from a decent clamshell to a professional.