Taken from fpsbanana, dunno if it works, out script masters will probably come here to make it better and enlarge their e-pen
Code:
//Easy Demo Recording
alias demorec "demorec1"
alias demorec1 "stop; record tmpdemo1; developer 1; echo Demo #1 recording on...; wait 100; developer 0; alias demorec demorec2"
alias demorec2 "stop; record tmpdemo2; developer 1; echo Demo #2 recording on...; wait 100; developer 0; alias demorec demorec3"
alias demorec3 "stop; record tmpdemo3; developer 1; echo Demo #3 recording on...; wait 100; developer 0; alias demorec demorec4"
alias demorec4 "stop; record tmpdemo4; developer 1; echo Demo #4 recording on...; wait 100; developer 0; alias demorec demorec5"
alias demorec5 "stop; record tmpdemo5; developer 1; echo Demo #5 recording on...; wait 100; developer 0; alias demorec demorec6"
alias demorec6 "stop; record tmpdemo6; developer 1; echo Demo #6 recording on...; wait 100; developer 0; alias demorec demorec7"
alias demorec7 "stop; record tmpdemo7; developer 1; echo Demo #7 recording on...; wait 100; developer 0; alias demorec demorec8"
alias demorec8 "stop; record tmpdemo8; developer 1; echo Demo #8 recording on...; wait 100; developer 0; alias demorec demorec9"
alias demorec9 "stop; record tmpdemo9; developer 1; echo Demo #9 recording on...; wait 100; developer 0; alias demorec demorec10"
alias demorec10 "stop; record tmpdemo10; developer 1; echo Demo #10 recording on...; wait 100; developer 0; alias demorec demorec1"
bind "F2" "demorec"
bind "F3" "stop"
Just put this in your autoexec.cfg. It binds F2 to record a demo, pressing F2 again stops recording the previous demo and starts a new one. When it gets to 10 demos, it overwrites them 1 by 1, so I advise you to rename them after you use them. Press F3 to stop recording demos all together.