The subject does not matter. Lighting, audio, "talent" appearance and skill, editing, planning the scene... and using the camcorder within its capabilities will be important.
For example, if the scenes are expected to be in low light, then use of a camcorder with a large lens diameter, large imaging chip system and a few manual controls on the outside of the camcorder... mounted to a tripod or other steadying device will start to help capture good quality video.
An alternative to shooting in poor lighting is to add light. This way, a less expensive camcorder (with smaller diameter lens and smaller imaging chip) can be used. All of the other factors will still apply.
As some point, the subject/topic becomes important enough that the quality of the video loses importance. That's why poor quality video captured on a cell phone can go viral and awesome video captured on a $4,000 4k camcorder does not...