Yeah I beleive you can download 3.72 and make a replay that people can watch in the current version.
Although now people just make multi uke replays by teleporting uke. I have never truly tested the 4 player thing.
I have tested it but I don't know if you can watch a 4 player replay in the current version of TB.
It is worth a try, I encourage someone to try it (hint hint nudge nudge).
Overall that was a pretty sick feature in toribash. Too bad it was taken away