This uses the time variable to be live, which it is. Just wait at most a minute for the video to load. Slower devices are prone to getting behind on the stream.
This is based on Twurtle TV, but uses no code besides the animation of Tom and Jerry. It is usually only off by a half a second between 2 devices. It uses the time to calculate what needs to be played when. Thanks to _Twurtle_ for the idea: https://scratch.mit.edu/users/_twurtle_/