more details about the American "fast D" sound

As I stated in a comment below, I didn't have time to cover all of the details of the American T in the YouTube video. Here are some more facts: This fast "d" sound occurs when a T is between two vowels but it also sometimes occurs when the letter T is before an R, as in "party", "forty" and "Marty" and sometimes when the T is before an L as in "little" and "bottle".