Perfect player is a specific m3u file player, not a web or local media player.

You can use youtube-dl to get the m3u of a youtube stream and use that to watch. if you need more help just pm me and ill give you a tutorial. I'm not sure how long your link will be authorized but its the best you can do.

You can add the stream to an M3U if you can figure out the actual URL, but not sure if youtube streams require authentication tokens or not. It can be done with regular H.265 streams in Kodi. Not sure if Perfect Player supports H.265 streams though.