The footage is still there. You have to look at the grass area first, where an effect of the light seems to move quickly up the screen. It cannot be verified to be a person, from that footage, whatever it is, it moves. Then look for a figure moving out from behind the bus stop advertising, this looks more like a person.
The footage is very grainy and would need some video enhancement in order to see if anything can be ascertained.
I’ve taken a couple of screenshots to point out the two areas of interest. The one closest to the bus stop could be a person, but the movement that kinda floats in the centre-right of the image might just be a light flare or similar?
Source: https://livetrains.co.uk/jamCams/osm/#00001.03770