There really is no such thing as a good
inexpensive fluid head for video - you generally get what you pay for.
To look at the huge price range, I would start here
When space and weight are at an absolute premium, I reluctantly use one of these
, although operating it is pretty bad and it needs a leveling base
to be usable.
If I was buying today, I would likely get a Miller.
Whatever you decide on, try it with your gear and do not buy 'blind'