I imagine 2 main limitations in a camcorder. Firstly, the capsules will have to be too close to give a good stereo effect. The supply to the capsules and general circuitry probably isn't high headroom enough to effectively capture a loud rock performance as the preset level is probably talking volume (and assuming you can't manually adjust the gain, there is probably a rather low quality limiting circuit in there?). Those WM61A capsules can have the linkwitz mod performed on them and, when wired up suitably, can handle 134db levels without distorting. I have parts here ready to make one, but still haven't done it.