May be vs Might vs Probably - Basic English Grammar

In this video, Alisha answers 5 questions. - What's the difference between "it" and "that"? Example: “ I do yoga every morning.” “ I do ( it / that ) too. - My question is what's different between "may" and "might"? - I want to ask how can use""may be"", ""might "" and ""probably""? - Can you explain the difference between ''all'' and ''whole'' with some examples? Thanks! - Can you explain ""a bit more sophisticated""?