The NFL Network will air a replay of the Friday 49ers-Raiders preseason game on Saturday, August 9th at 10:00pm PST.
Its on channel 36 at 10 pm and channel 5 at 11:30 pm also.
Man, finding out where it was playing on TV was like pulling teeth. Had to search the web and find some chat that revealed it was on CBS at 11:30… At least I can TIVO it and watch the action on Saturday morning…
If you live in Los Angeles, The game is on live on KTLA channel 5. Hope this helps.