Oh, this is thoroughly lovely! I love a lot of the clip juxtapositions -- Amy shooting the Doctor with the water pistol, River shooting his hat -- and you hit a lot of powerful emotional buttons here. And the song, which might have seemed over-the-top for a human POV character, feels just right for the Doctor. I like all the different ways the metaphor of radioactivity can work: the gold light of regeneration, the ways in which he can't help being dangerous to the humans around him. Beautiful stuff. And for a first vid, holy wow! I hope you will make more. <3