I hope you're not saying that a T1 line is faster than the average cable connection.
A T1 line is commercial not privately used. That runs at a faster speed like 768+kps over the residential 512kps. Those are strictly dedicated service lines without the same traffic seen with the usual ISPs.
and does anybody know why i have 2 let the videos buffer before i can watch them? instead of just watching it? is it just my internet speed?
It's not so much your own connection speed as it is their servers and the size of video files. Try downloading anything that are in the gigabytes not megs. Why do you think there are bit torrents available. Depending on the length and quality the buffer rate is there for data to catch up with previous data.