First when u start playing a match u want to record press F7 to start recording! It will either record until the map is finished or you hit the F8 button (which stops recording)! U can record as many demos as u like but be careful! Once u close Sam and start it again and record a new game the old demo will be overwritten! That why you should always do the following steps after recording demos!


Step 1 : Close Sam and go to the temp folder in your Sam directory! There should be files named recorded001.dem, recorded002.dem and so on
depending on how many demos you recorded!
Step 2 : Rename those files to whatever you want! For example firstwin.dem
Step 3 : Move the renamed *.dem files to your demo folder within the Sam folder
Step 4 : Open Sam again and go to the option "DEMOS" in the Main Menu
Step 5 : You should see a list of ur demos now! Click on the one you want to watch!
Step 6 : Enjoy the demo

Another option : (Submitted by Fastway)

Once you are in a game just hit esc and click on "record demo" in the options screen.
Then click on record new demo, then hit enter.

Demo will be automatically named and dated and put into your demo folder.
There also will be a thumbnail of the Demo if u do it that way!

U can switch between players by pressing the "+" on ur num pad and see up to four palyers at the same time by pressing the number 1,2,3 or 4 on your Num Pad

I created some bindings for me like: Pause, Forward, Fast Forward, Play etc.
If you wanna them, PM me