source TV records all points of view. it's like GOD in the server.
anyway, u load the demo with playdemo <demoname>
then in the game u use shift F2 to access the player that lets u scroll through the demo.
For another point of view (or player), u can either press control (when NOT in shift F2) and u see a menu at the bottom of ur screen to rotate players, OR u can disable this menu by pressing control again and navigating through the players with mouse clicks and space, just like in game.
1 last thing, i have noticed some misrepresentation in the source TV demos sometimes, Where a player is a little ahead of its actual position in game when they get killed, causing some shots to look like aim assist, even to best eyes around.
That said, u should always record a demo if you can in game, with
record <demo_name>
sb_status
*when done*
stop
so that you can see it in real time view... The only time i dont do that is when i am already recording someone else when the shit happeend and dont want to reveil who i was specking first, or if my fps drops too much at that time (hence watching it later), etc... but yeah. gd luck.