John Connolly scored an 83rd-minute penalty after Marcus Kane tripped Chris Scannell and Robert Garrett was sent-off for a second yellow card after 87.
"It's a whole new skill set to develop: to convince people to actually take out their credit card, even for one cent, " said Robert Kyncl, YouTube's vice president and global head of content partnerships, told reporters at the March event.
The Scot birdied three of the last six holes to card a closing 69 and force a play-off with Sweden's Robert Karlsson as they both finished on 10-under par.