Discussion:

Second time around with slightly less serious punching (which does make a difference) and less navigating:
1+2 1:31 3 0:21 4 0:47 5 1:26 6 0:48 7 0:31 8 2:27 (with mistake) 9 0:32 10 1:07 11 2:31 12 0:52 13 0:16 14-19 5:28 20 0:42 21 0:22 = 19:25.