The video was made using a (pretty great) free software called PowToon. PowToon uses the freemium model to generate revenue. In other words, it’s free, but if you want extra features, such as HD videos, ability to get rid of the watermark, etc., you have to pay a subscription fee. I thought $60/month for a monthly subscription was a little heavy, but if you buy a yearly one, the price drops down to $20/month, which sounds much more reasonable (I wish that was their regular price).
If you’re looking for a VoIP phone system for your business though, check out Telonium.