I really like the song so much so having first heard it with the documentary. For years I just thought the song was done specially for the documentary - I was 10 at the time! So when I got older I bought the video of the documentary which I've seen about 50 or so times! I made my now wife watch most of it when we were dating! Had she not understood the hero that is Bob Booker I'd have dumped her!

Having realised that the song wasn't done specially for us I bought a Judas Priest best of album so I could blast out the song at will and I realised how much I liked Judas Priest - if you've not heard Turbo Lover then you've not lived! Then I went to see Judas Priest live at the Arena, but to my huge disappointment they didn't sing United! They did sing Turbo lover though, which was some consolation - Ha ha!
Anyway sorry for that rather long and pointless post, but I thought I needed to share my love for the song and the United documentary. After all that, I don't think it would make a decent chant but I do still love the song.- as you probably guessed!