You have to fix it on OS X EL CAPTAIN

Your idea is pretty cool, I’d like to use it and give it five stars… but you have to fix this problem! When I try to open the app, it goes down like minimizing, and disappear. Thanks and great job, just fix it for us! UPDATING INFO: Now it is showing a black window like a player, but it toke to much time to show it! Still not working at all.

FabioSilveira about Miniplayer for Youtube