They could really work on the text-to-speech here, I've never heard anyone pronounce छह like "chhaha", always "chheh" instead
That's the pure pronunciation
Wrong. Che is the right pronunciation for the number.
Isnt this "cheh" in actual speak?
Yes, chah is one way of saying it, but most people do say chhe instead, both are correct.
where is the "there"?
It's not required in Hindi.
You could put वहाँ at the beginning of the sentence, if you want. Same meaning.
So is it छह or छ:?
Both are correct and are interchangeable. छह is the more wildly used one though.
There are hidden meanings