Watch your Language | Proto-Indo-European Ablaut explained @watchyourlanguage3870 | Uploaded November 2023 | Updated October 2024, 51 minutes ago.
Links:
Prequel about PIE *(s) and laryngeals: youtu.be/7My8EnkJEDU?si=WL2WVeXDxjS1TUbp
Timed link for Umlaut: youtu.be/zrXwzVquCWA?si=mdsKtLvCqGuB9nGq&t=797
Simon Roper’s video about PIE having two vowels: youtu.be/oJE3Ium5Q7Q?si=TTWvNYPK1lrPm1Ix