BIP39 stands for Bitcoin Advancement Proposal 39. The words are picked from a particular list of 2048 typical English words which can be accustomed to the generate a binary seed (your personal vital). You ought to be equipped to check if the final word in the seed within the video https://guidemysocial.com/story4201932/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39