I am very confused whether I need two cameras for videography and photography.

If you want to achieve the ultimate in both aspects, it is better to use dual computers. Nowadays, SLR cameras can also take pictures, but it still feels inconvenient. Today's cameras can also take still pictures, but they are not professional either. It seems that they cannot replace each other. If you have high requirements, you still need to prepare two cameras. If there are too many equipments to carry, just hire a photography assistant, haha.

Nowadays, people who take photography have two cameras, one is a SLR and the other is a compact camera. Or a new SLR, an old SLR. The purpose is to complement each other in terms of focal lengths and save the trouble of changing lenses back and forth. It is very necessary to take the time to snap the shot.