It's 29 minutes long. This is found on the second disc of the special edition DVD release of Predator. It spoils a lot of the film, and so will this review, so that I can go into more detail.
They talk about the origins of the concept. How the script was picked up. The similarity to The Wild Bunch and The Magnificent Seven. Ventura had to be told to be more subdued, at first. The big personalities on set. Arnie was who got Duke onto this, after they enjoyed working together in Commando(he also brought Winston on, due to their experience on The Terminator). Sonny could only work on it if there was a bodyguard - not for him, for everyone else, to protect them from him. Elpidia really understood her character, and had great instincts, never had to be corrected. They had to be taught how to be convincing as SEALs... except Jesse, who was one, and, well, he "wouldn't want to take these guys into combat". Competitive iron-pumping. Schwarzenegger bet The Body a bottle of champagne on who has the bigger arm. The jungle was intense. How they approached the FX. Black's mother didn't leave during the jokes about female genitalia, though she did when she realized his character was about to die. The flick remains beloved 15 years after, and Bill gets recognized on the street from his role in this. As the credits run, several of the people involved do their version of the line, "you're one ugly motherf'r".
I recommend this to any fan of the property. 8/10