Fix install cmd

youtubedl/install.go

@@ -42,7 +42,7 @@ func installPyPip3FFMPEG() error {
 		if err == nil {
 			return nil
 		}
-		log.Println("%v: %v", err, combo)
+		log.Printf("%v: %v", err, combo)
 	}
 	return errors.New("cannot get python3 and pip3 and ffmpeg")
 }