Are there very old skeletons that have red hair? Sure. That isn’t the myth. The myth is that a skeleton or mummy with red hair means that said specimen is evidence of nephilim or visitation of Old World giants in the New World. (I’ve asked before for the verse that says the nephilim had double rows of teeth or elongated skulls, so let’s also ask for the verse about their red hair).
Here’s a fairly short but substantive essay from Carl Feagans, a credentialed anthropologist whose focus is prehistoric archaeology: “Hair Color and Mummification.” From the essay:
. . . the presence of red hair on skeletonized human remains in Peru is not evidence for aliens, nephilim, giants, or pre-Columbian contact.
Pseudoscience proponents like Brien Foerster and the “team” that was featured in the video showing the pretended collection of data for DNA testing are missing two important things in their quest to prove their pre-conceived conclusions.
If you want to know what those two things are, read the essay!