Hi there, sorry to hear of your troubles. There actually is no intro movie, so it's definitely not that. Haven't been any updates lately to the game either, so it shouldn't be anything there, either.
A couple of things to try:
1. Verify your local steam cache, so that it can fix anything that got messed up somehow.
2. Take a look in the install folder of the game, under RuntimeData, and post any error messages that might be there.
3. Take a look in the install folder of the game, and rename settings.dat to something like settings2.dat. Then delete settings.bak and start the game. That will reset your settings to the default, so any issues there would resolve themselves.
Hope that helps!