hi! Could you specify which documentaries you're referring to, or at least what they are claiming? That will help people assess their claims. Also, btw, while there are anthropologists in this sub, this question may be better suited to our sister sub, /r/AskAnthropology.

Warning: not a historian

While we wait to hear what documentaries you're talking about, I just want to briefly say that, while it's fun to imagine an alternative timeline, there's very little evidence to support such claims. People like David Rohl, Graham Hancock, Randall Carlson, etc. are extremely intelligent and have some legitimate insights, but they don't approach these subjects scientifically. Instead, they set out to prove their predetermined conclusions (much like creationism). We need EVIDENCE to construct a historical narrative and, unfortunately, mythical tales aren't enough.

Edit: But this doesn't mean that young historians should feel discouraged from challenging commonly held beliefs. Check this out.