https://www.youtube.com/user/drkimbeverlyhills/videos
i personally like these:
https://youtu.be/cV6ZebEKLDA
https://youtu.be/SaTrtozVI-Y
https://youtu.be/bXdaS4ERnNo
https://youtu.be/AunQ4yBsfy8(http://www.autoadmit.com/thread.php?thread_id=4008038&forum_id=2#36290754)
https://youtu.be/cV6ZebEKLDA?t=259
https://youtu.be/bXdaS4ERnNo?t=227
(http://www.autoadmit.com/thread.php?thread_id=4008038&forum_id=2#36290772)