He said there is a highly secret black program to retrieve non human intelligence (NHI) spacecraft and that he has classified evidence, including witnesses and locations, that he can provide to Congress for further investigation. He also said we have craft and non human bodies from them.
This is substantial because his claims are falsifiable and easy to investigate for Congress, potentially giving us insight into whether or not we actually have aliens and it's been covered up. I wouldn't believe this until we see a photo and/or Joe Biden says it's true, but you should definitely follow this story and tell your friends about it so that they are prepared if it is shown to be true.
Up above aliens hover Making home movies for the folks back home Of all these creatures who lock up their spirits Drill holes in themselves and live for their secrets