I made a short video from a few photographs I’ve taken this year. Brandon Stanley mentioned Adobe After Effects to me as a way to visualize photos. I had a bit of a go at it and ended up using the free Video Editor OpenShot. I’m content with the outcome, easy to use software and stable on my Ubuntu OS. The pan and zoom effects are unfortunately not comprehensive enough. I had also a go at Kdenlive (another free, open-source video editor), which seemed to offer a better range and diversity of effects, but it crashed on my system.
Set the youtube settings to Youtube-HD 720p for best resolution.