I’ve posted a video tutorial which demonstrates a technique for creating a realistic TV glow and flicker effect in Unreal Engine 4. The example also shows the basics of playing back video and audio using the Media Player asset. If you like the video, consider subscribing to my channel, The Unrealist!
Material nodes used in this example include SpiralBlur-Texture, TextureObject, and ComponentMask.
Unreal Engine version shown: 4.15