CircaVie is just about the easiest online web application I’ve found to make timelines. To add images or video to the timelines you’re making all you have to do is write in the url where they are found.
I’ll be having students use this application when we study a unit on the life of Nelson Mandela. They’ll make a timeline of his life.
I’ve placed the link on my Examples of Student Work page under Student Timelines.