I believe it's an adult liver fluke. I passed 4 of these roughly the same size as the one in the vid to maybe a half inch wider ony my third day of Humaworm. One was pale just like that & the others were so darkened & had lots of "tentacle" thingys coming out from it. I noticed shortly after that all the rumbling & jumping in my liver calmed.
Please anyone feel free to correct me, but I agree with the guy in the vid, it's a mamoth sized liver fluke!