fancam; idol focus cam
Slang used in idol fandom for a video where the camera follows a specific performer throughout a live stage.
See also: 推し
ライブの推しカメラ動画を何度も見返してしまう。
I keep rewatching the fancam video of my favorite member from the live performance.
Compound of 推し (oshi, 'one's favorite idol or member') and カメラ (kamera, 'camera'). The term originated in Japanese idol fandom.