For quick and flashy - but with hardly any info - animoto will work. But you need patience - and a good connection speed. To use to the greatest purpose, you'd need to join. 30 seconds is almost nothing.
For fun & silliness, but slow, too - goanimate will work - and you can add info, and change the speed of the slides, so people can read things
For different fun - and speed - and info - and, actually, ease of use, range of music and styles - onetruemedia.
That's it - my thoughts on this part.