Sorry this is 6 months late... I should really check these forums. Made the category under misc cuz why not

If you do not stop the demo when screen fades to black (as timed in non-solo coop coure 6) and let the cutscene continue then the Portal 2 coop timer does not cut the length of the cutscene (2min23-25sec).

I suggest timing the last demo like this:

• let demo to record (last cutscene to be recorded as well) and load back into the lobby, then stop the demo
• the last cutscene in total is 8654 ticks (2min24s234ms) so that should be subtracted from the adjusted ticks and time