The Godfather: The Game/Secrets

Movie Clips
To unlock the movies complete each of the missions:

Infinite Ammo
Become the Don of New York and your ammo will never run out.

Unlimited Money and Respect glitch
After completing the first mission, save and quit before answering the phone. Reload and you will get $500 and 500 Respect for the mission you just finished. You can save and reload as many times as you like. This may not work on all versions.

A Few Interesting Things Around The Streets Of New York

 * Target a hobo and take a couple punches, if his ring turns red and he fights back, kill him and collect up to $5000
 * Keep your eyes open for robberies, if you see a defenseless woman getting beat up, protect her and kill her attacker.
 * Sometimes if your heat is at five stars, there are a few cops you can bribe to make it go down.
 * There are numerous ramps set up on the streets. You finish the rest...
 * If you kill the Underboss in Barzini in their compound who is guarding the left side steps he will drop $20,000 in cash. (XBOX 360 only)
 * In some versions of the game there are a few locations where gangsters around a truck guard a money bag. If you are successful in taking the money bag from them, it will show up in Thom's Report as "Living World Money Bags", More details in this post.

Hooker crew members
In the Playstation 3 and Wii versions of the game, you can hire a hooker to assist you, similar to hiring a crew member. On the Playstation 3, at some point in the game (perhaps after you have flirted with 25 hookers and made a move on 25 hookers), hookers will appear at some of your safe houses. They all have a "5-stripe" rank, so you cannot hire one until you become Don of NYC. The safe houses are: The feature is similar on the Wii, see this GameFAQs post for more details.
 * Little Italy - Bowery Hotel
 * Hell’s Kitchen - The Elegante
 * Brooklyn - St. Sebastian Hotel
 * Midtown - Savannah Hotel
 * New Jersey - George Hotel