In what way is that piece of info useful? Does it tell us anything about the global status during that period? Were at least 85% of all the world's glaciers receding then, as is currently happening?
In most all cases, 'doing your own research' is just code for choosing what you prefer to believe. We read things, we watch videos, we have discussions with people, but of course we don't read everything that's written, we don't watch all videos, and we don't discuss things with all people. We expose ourselves to a tiny subset of information, mostly from sources we already trust, preserve the bits that we most like believing, throw out the bits that we prefer not to believe, and reserve a few other in-between bits for possible later consideration.