SlikPro 700DX Tripod KIT with 3-Way Pan & Tilt Head, for Mirrorless/DSLR Sony Nikon Canon Fuji Cameras and More - Black (615-316)

Curious to know if the Pro 700DX works well for occasional video applications. Have a D-4, and would like to take some video of my Whippet running.

Am I correct in assuming this works with a Canon 70 D; and with a heavy and long 200 mm zoom? Thanks.

will this work with a spotting scope or is it set up primarily for cameras??

Is the head detachable? Possible to change heads from what comes along ?