Ahoy! Painting animation

I've been wanting to do something like this for a while:
this is a little animation of the stages of the watercolour painting of 'playing pirates' that I started some weeks ago.

the colour difference at the end is because most images were taken with a camera except for the last which was professionally scanned. (painting was too big to fit in my scanner)

I used the animation capabilities in Photoshop for this. It was pretty easy, but I had to take the smooth fades out because it was making the file size too big. What do other people use to make videos/slideshows for the web?

(i hope it works!)