A personal endorsement: I got the Depan filter (madeby Fizick) and I found it works very well. It is "made" for Video Studio - the interface is identical to the other filters.
Having just been away on holiday, and having done some wildlife photography out of boats with 40X zoom happening, some clips were in need of help

The documentation is quite correct; it does NOT replace a tripod, and some really bad video just cannot be fixed with anything. But the marginal stuff, which has the minor and really annoying jitters, looks much better after treatment.
(I have VS9, BTW)