What is the difference between a tripod for a camcorder and one for a stills camera?

I'm looking to purchase a second tripod, we currently have one designed for a stills camera - the head moves in three directions. What is the advantage of buying a tripod (or head) specifically designed for video cameras? - does it really just need to pan in two directions and have a fluid mount? - yours, confused!

My views are:

Smooth panning tripods, those which have a fluid mount (which absorbs some judder) are very useful if you wish to video motor sports (would only need to pan in one plane) or activities with elements of height say kids on a big bouncy castle (where you may use 2 planes)

Judder is very difficult to remove in post production, so it is important that it is minimised at point of shoot.

I would advise getting a fluid mount for this purpose, plus it will help reduce judder on a still camera anyway, and lets be honest you can never have enough tripods can ya? As far as the mounting screw (size & threads), they are the same...you can mount a camcorder on a regular tripod and vice versa. The main difference is in the tripod head, that allows for smoother panning...and that video tripod are heavier duty. Tripods have a universal screw mount, so you can use your "still" camera tripod for yor camcorder and vice versa. The main difference is the fluid dampened head. If you are shooting a lot of action - think sports like soccer, basketball, football, etc. - a fluid head tripod is nice because it allows you to smoothly follow the action. Do you absolutely need one? Depends on your subject.