If you need an affordable kit for talking head style video, B&H has a great deal on this Raya 7 Bulb Softbox 2 Light Kit.
I find that I like to have 2 soft lights for most of my interview setups, one as a key, the second as a kicker. Then I'll often pull in a third hard light for the background.
Or if filming both the interviewer and interviewee, one soft light for each as a key which then double as the kicker.
You should be able to get all the light you'd need out of these.