Its not loads of replays, I only have the free version of fraps (30 second recording). You can time each replay if you want (when i was on the pipe) and they will all be almost 30 seconds.
Start > roof = 1 rep
Roof > rock > oil thing = 1 rep
oil > all of the pipe > oil at the end = 1 rep
oil > prec > onto pipe = 1 rep
pipe > steps > pipe = 1 rep
pipe > dropbump = 1 rep
roof > pipe > roof = 1 rep
roofbump > finish = 1 rep
I don't think it is possible in less that 7 replays and i did it in 8.
Apologise pls