Hello there! So, what you need is a loopable song, the one that could have enough content for 30 seconds video, but the one that could also be easily expanded to last longer if necessary, correct?
If so, then I believe that I might be an interesting fit for what you require! Trailer music has it's own sophisticated 'taste' and need to have a decent amount of energy, especially in Sports/Football management content.
If interested, get in touch and let me know more information on the style you're after and other details. I'd love to find out more about your project! More info on my expertise and experience may be found on my profile page here on site.
Sincerely,
Andy
AB Sound Production