I believe it is 100 currently.
it can be raised though, in the server preferences i believe
I think you'll find for anyone that events builds for fun, 60 events doesn't get very far. In fact its only just over half the capacity a single brick will take. The only reason 3 to 10 events per brick is so common is because most people don't take the time to utilize the event system properly. OP should definitely venture out more, if 60 events got this far there is plenty of potential for much longer movie reels.
On-topic: Very nice! It looked almost as if you used real actors :P
What video software did you use?
I think you should make more of these. Perhaps a scene from an existing Blockland movie.
I was hoping others might make a play or two, I have a bit on my plate and probably won't have time :/
Then wand the plate and start over but would seriously like to see some longer ones, this has really great potential.