While I share in the joy of this brothers testimony I do not endorse the "pray this prayer and you will be saved" statement that is presented in the video.  Though people have been saved who have genuinely prayed a similar prayer they we're not saved by repeating some formulated prayer but by placing saving faith in Jesus Christ.  There is no biblical basis for leading people in a "sinner's prayer" or of assuring someone of their salvation because they at one time prayed a sinner's prayer.  Aside from the prayer at the end of the video it's a wonderful testimony of how God is saving Muslims in a most remarkable way.