Definition: FPS = Frames Per Second SRV = Speed Ratio Video Streaming Service Definition: A video streaming service (VSS) allows you to stream videos from anywhere on Earth or any device that has a compatible video encoder. Definition: - Speed Ratio refers to the number of frames per second (fps) in a video. It measures how fast the frame rate of an image is. - Video Streaming Service (VSS) is a platform that allows users to upload and stream videos from anywhere on Earth or any device.