A half radial rear wheel only makes sense on a geared bike with a dished rear wheel. Drive side radial isn't necessarily a bad idea, depending on the hub and how the left side is laced. At any rate, don't do this with a FG or SS wheel. Keep it 3x on both sides or 2x for lesser spoke counts. A full radial rear wheel (or any wheel in which the hub is subjected to torque, such as a front wheel with a disc brake) is almost universally considered to be a very bad idea.

On the other hand, radial is fine on the front wheel, as long as you are not using any sort of hub brake. It is not necessarily "weaker" as many people mistakenly claim. Radially laced wheels are lighter (barely), more aero (again, barely), and possibly stiffer both laterally and radially (but probably barely). But they look better to many (subjective), and are easier to build and true. You certainly don't need a video to lace a wheel radially. The "weaker" argument is based on the greater stress that radially projecting spokes exert on the hub flange, although there are lots of hubs out there that are built to withstand radial lacing. If you've got an appropriate hub, there's no reason not to build a radially laced front wheel. Most high flange track hubs are not built specifically for radial lacing, but most are generally able to withstand it. At any rate, I've never heard of one failing under normal riding conditions, other than one single instance of an old Campy hub that is widely circulated on the web.