Hippo Hero - ABC News Broadcast 1987/88. Sydney, Australia 

This year I digitised several of my family's old VHS tapes, including this one. The VHS tape only holds this clip - the tape length itself is very short.
The cassette was labeled "Hippo Vs. Croc" and nothing else.
I can only infer the date from the very end with the Young Endeavour - Britain's sailing ship gifted to Australia for it's 1988 bicentennial in January - so probably from some time around then.