Though short it may be, someone from Nico Nico Douga has managed to upload a video of what appears to be official Mega Man 9 gameplay. As such, someone from YouTube was nice enough to transfer and upload the video, giving you, the viewer, the honor of being able to watch it. Hopefully as of this posting the video is not removed, so watch to your hearts content.
After all, the music is awesome!
Image courtesy of Capcom