On the internet you can find so many tools for video and those are works good, such as:
Camtasia: this is really good for screen recording in pc.
Animoto: This is really works great for animation from images, videos, and music, but this is not free though it has free trial.
Common craft: For making good story its works great.
Prezi:For slide presentation this tools works nice.
Stroome: For conference or big even this tool works good.