Only a small compilation available.
If you watched him closely, you'd see that he's extremely prone to errors, either by being cocky with the ball or by being really bad at goalkeeping (bad exits for the ball, miscommunicating with the defense etc).
You'd need a lot of dedication to make something like that and I doubt anyone cares, Ajax fans liked the guy and they were winning so it's not like he was a catalyst for them missing out on trophies, aside from the CL semi and the EL final of course, but they weren't expected to win those I guess.