What should be my ISO speed be when recording? Also which one of the lens's i listed above do you think is best for recording?
The counter-question is, when you are recording what? fast-moving subject against distant background (like a bird in flight) ? fast-moving subject against nearer background (sports photography) ? dim light indoors? bright sunlight outdoors? something else?
ISO speed should be set according to some idea of what the lighting, and movement, conditions are, in the subject you will photograph. Still subject in dim light can use an speed, but the dim lighting will make a speed at one end of the range more efficient. Fast subjects require a fast ISO speed in order to avoid blurring, but require brighter lighting to come out properly.
These two pages go into the basics of using the ISO setting:
As for which lens... actually you list 3 lenses:
-AF-S DX NIKKOR 18-55MM F/3.5-5.6G VR II Lens
-AF-S DX VR ZOOM-NIKKOR 55-200MM F/4-5.6G Lens
-Tamron SP AF 17-50mm F/2.8
the first is a medium focal length lens.
the second is a long-focal-length lens, a Zoom lens basically.
the third is a medium-short focal-length lens.
The second one being a Zoom lens with highly variable and possibly long focal length, means it's made for outdoor photos of things at a distance. It might be best for outdoor and distant vistas or landscape photos, and also birds on boughs at a fair or long distance.
The other two are similar to each other, I think. But the Nikkor differs in having a variable F-setting value, but the Tamron has apparently a fixed or invariant F-setting value. That would make the Tamron rather specialized.