Here's an excerpt:
1953 - Hugh Hefner starts Playboy
1965 - Bob Guccione starts Penthouse
1968 - Al Goldstein starts Screw
1969 - First mainstream movie to represent the swinger lifestyle - Bob & Carol & Ted & Alice, Directed by Paul Mazursky
1970 - Penthouse shows pubic hair for the first time.
1970 - Notable Porn Movies - Cycle Studs - Le Salon (Gay)
1971 - Notable Porn Movies - The Boys in the Sand - Wakefield Poole (Gay)
1971 - First condom to appear in a movie - Carnal Knowledge, Directed by Mike Nichols
1972 - Notable Porn Movies - Deep Throat - Gerard Damiano (Straight)
1972 - Notable Porn Movies - Behind the Green Door - The Mitchell Brothers (Straight)
1972 - Notable Porn Movies - Fritz the Cat - Ralph Bakshi (Anime)
1974 - Larry Flynt starts Hustler.
1975 - Betamax introduced
After the Betamax, the whole porn thing just exploded into what it was now. I'm not sure about the roots of Philippine Porn but I guess the first ever "mainstream" distributed porn was the alleged tape recording of former Philippine President Ferdinand Marcos with U.S actress Dovey Beams.
I haven't heard the tape but I ummm... hear that it even includes the former strongman singing a native song to Dovey....