You can create animated strats for CS 1.6 and CS:S by placing player objects (CT or T), nades, bombs, etc on a map overview and give them a path to move. Setup timing for the movements and nades then you play it back like a movie. There are also options to export the strat as a video file using the video export option. The best part is the program is FREE.
you can find more info about what CSStrat is and download it here