There are plenty of U-tube videos. Just do a search for "Australian accent".
The Australian and South African accents may sound similar to people from the northern hemisphere , as might the Aussie and New Zealand accents. But they are all very distinguishable by speakers of any of those three.
For example, to an Australian, Seth Efricans say their country like that. Some of their vowels are clipped short compared to Australian, and overall the SAE accent is probably closer to RP than the AusE accent.
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