One thing about the videos I noticed, they are shot at quite a
high angle. Unless the idiot(s) who shot it are tall, have a ladder
or whatever freak reason, I somehow don't believe is real in some
ways.
Yishun video happened in the morning and Admiralty happened in
noon time.
During these hours, there are bound to have crowds. Who so free go
and make a fake video without letting other people recognise?
Hmm... Yishun one happened a tad too early. It's slightly before
7am, and the station isn't too crowded. Admiralty one not
sure.
The timing of the video might also be a problem. Not willing to say
more, because it's after all a video, and something called parallax
error.
Yishun video... where on earth did the man pop from? While it's
true he fell, can't see him from anywhere. 
