The guy who uploaded this admits the audio is dubbed over, but he says that it's the English sound file from the the on-disc DLC of Street Fighter X Tekken This is the ending for Original Box Art Mega Man, who releases (with Pac-Man) for free on Tuesday, and he name-checks two major publishers, including his own.
We're aware the authenticity of the audio is disputed but the video itself isn't. And it is strange. See and hear for yourself. I guess he finally got the news Mega Man Legends 3 was canceled?
Mega Man's Ending from Street Fighter X Tekken [Tiny Cartridge]