playing a part in one's own play, film, etc.; directing one's own play, film, etc.
彼はステージで自演を披露した。
He presented his self-performance on stage.
複数のアカウントでの自演が発覚した。
His sockpuppeting with multiple accounts was exposed.
彼女はガラコンサートで自作のピアノ協奏曲を自演した。
She self-performed her own piano concerto at the gala concert.