This is a live stream from Tokyo.
The green trains on the middle two tracks are the Yamanote line and blue trains on the outer two tracks are the Keihin Tohoku line. Both lines run every 2-5 minutes and there are three peaks in Tokyo AM, PM and late night.
Due the 13 hour time difference you will see action through the night into the morning. On DST I see trains from about 530pm until late morning.
For comparison here are a couple of platform level videos from You Tube.
Night
Daytime