A replay ends when you die. If you want to record again, save another replay. Replay system is very unstable and unreliable. Sometimes the clip just won't work. A lot of the other time it'll crash your TF2. With each new update, the chances of your replay breaking goes higher. Also, whenever I record a replay, voice talk of players is always delayed by a few seconds.
The good thing about replay is it's extremely easy to use and the quality is just fantastic.
If you want more reliable use TF2 demo.
record by typing
record yourdemonamehere
and when you are done type
stop
to stop recording
tf2 demo is 100% reliable, at least from my experience. but i also get voice chat bug with demo. the quality here isn't as superb as replay (on my end at least) but you can still do lots of things you could with replay editor...it's just a bit more complicated.
edit: you could probably get amazing quality with demo too if you take the hard way and mess around with .tga files
in other news, i'm not sure which event you are referring to but if it's the one where we played BM 2.0 beta around noon or so central time...then i've the replay and demo saved up.