I usually go with the Youtube classification for whether something is live or not, as the videos that old have poor sourcing, and it can be difficult to tell. I chose this particular clip because it had the best version of the drum solo from the original, and a better sound quality than the band's official video.
Here's other ones I found in case you're interested:
Official music video - pretty cruddy video, bad sound quality, but it does have the drum solo
"Live" in 1973 - good energy, cruddy sound quality with unbalanced mixing, sloppy tempo, weak vocals
White Lion version - a pretty decent cover. Probably best video of the song, and the guitar work is great... but the drummer can't pull off the original solo which is the heart of the original, and the vocals are meh.