For Brits, this is available on iPlayer for the next 16 days. I'd thoroughly recommend it:

I knew basically nothing about OJ Simpson and the murder trial before watching this. All I knew was 'if the glove doesn't fit...', the 'pursuit' of the white Bronco, and some jokes Eminem made on 'Role Model'.

Even as someone with little to no interest in American Football (and sports in general, really), watching OJ play is amazing:

Actually, although I rarely watch sport live, I am a sucker for sports highlights and I love sports documentaries and books (or at least, the ones I've watched and read). I feel impoverished by my lack of passion for sport. But this is by the by.