I think History of the Slayer made the pilot seem much more action packed than it actually was. Then, of course, the entire first season is very watered down action-wise compared to the rest of the show. Still, I think the clip would've made me want to watch the show too, had I seen it.
Haha, I used to have so much fun reciting the whole "slayer" monologue at the beginning of each episode. My family wanted to kill me, I was so obnoxious about it.