If this is a specific media title you're looking for, here are the most likely things it could be:

It looks like "Beauty Killer 1.mkv.mp4" is a specific video file—likely a movie, tutorial, or music video—rather than a widely known commercial product or app. Because the filename contains double extensions ( .mkv.mp4 ), it often indicates a file that has been renamed or converted, common in personal collections or digital downloads.

Beauty Killer is the debut studio album by Jeffree Star . If this is a music video or concert footage from that era, fans generally praise it for its high-energy, early 2010s synth-pop aesthetic and bold visuals.