I watched this video twice and understood only one thing. Economic crisis cant be only in one country. if something happened in one country, it will be the same on other countries. We saw that economic crisis began in the USA and overlapped Europe, Russia and Asian countries. .

To understand the video completely I had to watch this video for several times... first everything seems to be very logical but one moment later - bang! - you lose track of it. But still the main idea is quite clear - it's all about mortgage and people's greed
btw, you know that nowadays mortages become popular in our country. When this phenomenon apeeared, very few people were brave enough to take out a mortgage on something. But obtrusive ads have achieved their aims - more and more people are ready to receive mortgages... Can it turn out that the situation in America that has led to economic crisis is going to take place in our country?

yes, people's greed is the root of all evil.
As for your last question, I don't think such a situation may occur in our country. Though people begin to take mortgages, they are not so popular yet. And for the system to crash the majority of the population should be owing banks.

And what’s about government’s role in all this? There are different encouraged programs that help lower-income households purchase a house. Nothing is said about it.

I'm not a dummie, but I like the video. The financial crisis shows us that all economic systems of every country are closely connected in one phenomenon called "World Economic System". The fail of one country can ruin all economic system. And instead of cooperating many countries try to sink their rivals in order to achieve profit in the world of global business.