A good video tripod must resist twisting. You wouldn't want your panning shots to spring back (i.e. tripod untwist) at the end of your pan.
Single-rod tripods usually won't make the cut for heavy cams tat uses video head with high drags in such a case.
I saw these Secced ARES tripods at Braodcast Asia yesterday, at the Medios stand. They are super-smooth, like Sachtler, but much cheaper (made in China I think). I am considering getting the ARES1 for my XH-A1, it is around S$900.