If you followed the teaser from Midweek this will come as no surprise as my choice of Glastonbury Festival performance is, I admit, entirely bias !
As the teaser video explained it was their 2004 appearance in the John Peel tent (then simply called 'The New Tent') that broke the band, coming just weeks after the release of their debut album 'Hot Fuss'.  
They then surprised fans in 2017 with a special appearance on the same (small) stage at Glastonbury as the packed tent spilled out at the edges. 
I have found two ways to view this set closing track. One from within the audience (from that 2017 show) with a singalong to this epic song - all waving flags and hands in a sea of selfie-stick phones and GoPro cameras.  
But first here's the band headlining on the main stage in 2007 > "Mr Brightside"

Now join the packed crowd for this >
Quote "We've played Mr. Brightside probably fifteen hundred times live and I think that was the craziest it's ever been" – Brandon Flowers

*The Killers have been a Star track before, but would you believe that was nearly 3 years ago ?

> This BBC link will give you a full run down of The Glastonbury Experience on all platforms. This will require a certain amount of remote-control gymnastics as you channel-hop your way to your favourite memory. Or set your machine to 'record' if you're able.