how to add video on another video as overlay
<p>I am stuck on overlay video into another video, as I successfully add video on another video but not able to make scale same for both videos. taking reference from <a href="https://stackoverflow.com/questions/29270719/objective-c-how-to-add-overlay-to-video-using-avfoundation">this</a>.</p>

<p><strong>note: I have to add overlay video with transparency so below video visible.</strong></p>