Nice video.
It summarizes the two schools quite well.
The following isn't a video but it compares the supply-side and the demand-side economics.
A Primer on Supply-Side vs Demand-Side Economics
For those of you without time to read the link above, here are some interesting questions:
1. If lower tax creates jobs and is good for economy, is the best tax rate 0% for everyone? Never mind the social programs but who then pays for the military?
2. Is the factory not hiring because tax is too high? Or, because no one has the money to buy?
Also, can we agree that we ALL pay taxes?
If you are inclined, you can follow this link.
Misconceptions and Realities About Who Pays Taxes — Center on Budget and Policy Priorities