Really cool that this came from video. I love that you caught a spontaneous moment with your daughter singing. She must be creative. Doesn't look like Grandma liked the song tho lol. Poor grandma with the bandaid - what an awkward spot for it. Love this fun candid.
for a single frame video this is awesome
i am glad you posted this as i was wondering how the 7D performed in video still
It was downsized from the still and shot at very high ISO.
As far as it being bright, I tend to agree it looks a bit bright, I don't remember seeing that in the original, perhaps something is jazzed up with my "save for web" settings.