Watching the highlights of that test again, its clear that the try resulting from Taute's failure to find touch, which was damn close to being a good touch finder, had much to do with poor Goosen limping his way across in cover defence and not being in a position to take Whitelock out.
Then we have the Dagg goose step to throw Taute off on the outside, but Bekker's miss on Dagg was even worse than the Taute miss. Taute got less hands on Dagg than Bekker did - Taute was beaten, Bekker just missed a standard tackle.
Now for that minute 4.20 try - I'd say Jean was the main culprit here. He sprints out of line and ends up getting the decoy runner in his face, leaving Gear with space to create the overlap - Hougaard and Taute had no chance - its space created by a decoy and additional runner. To be frank, no Bok player was to blame as it was more about a great try created by the AB's.
The only way to create space in modern test rugby is by employing decoy runners, having additional players running great angles/lines (Gear coming from the blindside to join the line, after the decoy created by the loosie), players looping to create additional personnel, like Cruden does for the Saders and inside backs throwing the flat long pass to put players into space.