Television signals provide a slideshow of images fast enough to fool our eye into believing we are seeing real motion.
Film uses 24 frames and television uses 30 frames per second, and the combination of frame size used and the number of frames per second contains far more data than Internet data transfer can handle.
There is not enough bandwidth. To give the appearance of video on a computer screen both the size of the frame, the number frames, and the quality or amount of data in any one frame is significantly reduced.
Different programmers have implemented procedures in different ways, but none of them have a universal way to integrated time events. The first effort then must to introduce standards to allow more effective integration.