What is the method for preventing the QuickTime Player from capturing streaming videos of iOS 8 apps on Yosemite while screen recording is on?

The QuickTime Player on Yosemite cannot record encrypted media by the HTTP Live Streams during screen recording. As a result, these will simply black out in the recorded video.

The HTTP Live Streaming tech (HLS) from Apple allows you to send and receive on-demand and live video and audio media on your iPad, iPhone, Apple TV, Mac and PC. HLS uses the very same properties and procedures which drive the web and thus, lets the user make use of content with the help of ordinary content delivery networks and web servers. HLS is exclusively designed for high reliability and it dynamically modifies itself to suit the network conditions. This is done by optimization of playback according to the available connection speed offered by wired or wireless devices.