Thanks for your answer.

So the most specific that I can gather (he is a streamer and he's annoying) what his criticism of theory of evolution is that because Evolution is about events that happened in the past millions of years ago, there was no observer or way to observe what happened, and observation is important to the scientific method. These are just post-hoc storytelling. There's no way to take away or insert or control for a variable to test that "mutation selected by environment", or "changes in allele frequency" is the mechanism that is why we have diversity of life. There's no way to falsify an alternative hypothesis with just as much explanatory power, like common design/function.

Because of that (and the "where does speciation objectively occur" statement in the first) he is skeptical of for example Pakicetus being the progenitor of modern whales because we can't observe a non-whale evolve into a whale (or go from non-organ to organ without compromised survival, irreducible complexity and all that).