So nothing much to add by seeing the whole picture, he ended the speech talking the talk which one would expect him to end with.
It's Usual Biden who thinks he's funny when he cracks derogatory shit at people. Stupid Kunt he always has been with a filthy, contemptuos attitude and this video is him doing it again. A fault on him and no one else, he is a narcisist and abuser of anybody he thinks he can control and it shows his usual lack of respect for people when they don't act as he wished they would.
Also the video from 4 and a half year ago shows that even back then his cognitive decline and lack of energy and enthusiasm were well and truly on show.