If you turn on Show More Than Drivers for a model inthe chor you can access the properties of its decals. There you can keyframe "frame" values to make an image sequence play at other than the default.
You can apply a decal to an object in the chor from any view point. Pick the object inthe chor, then on it in the Objects folder and choose New Decal, then you can place a decal in your current view. The decal sizing is very finicky in perspective views.