During lockdown in April 2020, the frontman looked back at the video and noted: "It's just a song about betrayal. I was betrayed and I was able to turn it into a masterpiece".
From the article "The lyric is about a man who is obsessed with a girl that is seeing another man… and the thoughts that go through his head, imagining what they’re doing behind closed doors…" I guess I was wrong, it's envy not jealousy.
It's not. It's about a guy who can't beat jealousy and believes he's being cheated on "except it's all in [his] head"
Ah my bad. I thought the song was written by Brandon Flowers after catching his girlfriend cheating on him in a bar in his hometown of Las Vegas.
https://www.radiox.co.uk/artists/the-killers/what-is-the-killers-song-mr-brightside-about/
From the article "The lyric is about a man who is obsessed with a girl that is seeing another man… and the thoughts that go through his head, imagining what they’re doing behind closed doors…" I guess I was wrong, it's envy not jealousy.