[NJARC] Television question

[Joe Devonshire via NJARC]

Hi everybody,
 
    Maine is great, but the TV leaves a bit to be  desired, over the air 
that is.  Yes, we knew what we were getting  into.  Anyway, I'm looking for 
some advise on how to go about using my  computer to watch youtube on our TV.  
The television is an analog  CRT.  Keeping with the nature of our club, it 
is a 1987 RCA 27".
    The TV has RCA jacks for video and audio.  No  other input is 
available.  I understand there is a S-video converter box  that I need, but where can 
I get one?
 
    Anybody have any advise?
 
Thanks,
Joe Devonshire