DRM Text is a feature used for watermarking your video content with website and user data, thus allowing you to prove you are the original content owner in case someone stole your video by screen capturing it. You can read more about this feature in this guide Protecting Videos With DRM Text.
The demo below shows the more secure Flash preset of DRM text which flashes at random times and is hard to notice. It is also possible to make the DRM text visible at all times, using the Watermark preset.