Would you rather have all the gold in the world, or all the farmland in the United States?

That's a no-brainer for Warren Buffett, who likes investments that produce and deliver returns. With gold, he told CNBC today, all you can do is hold on to it and hope that people become more afraid.

All the gold in the world is worth about $7 trillion, he said on CNBC. You can take that same chunk of change and buy seven Exxon Mobils (XOM) and still have trillions left in "walking-around money," he said. "The problem with commodities is you're betting on what someone will pay for them in six months," he added.

We have lots of videos of Buffett speaking about his investment strategy, his likes and dislikes, and about how he just lost an acquisition to another suitor. The videos will start playing below -- or, you can click here to specifically catch Buffett's take on gold vs. Exxon Mobil.

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Here's a rundown of some of the other Buffett videos that came out of the extended interview:

On the economy. America gets off the track from time to time, Buffett said, and that was particularly true in the fall of 2008. But you cant stop this country, which has survived more than a dozen depressions of some sort.

"It'll sputter from time to time in the future, but you don't want to get too concerned about it," he said. "We have great soil for this country, metaphorically. It works over time." The railroad business is about 60% of the way back from the bottom, Buffett said. His company, Berkshire Hathaway (BRK.B), spent $34 billion on railroad giant Burlington Northern Santa Fe in 2009. Click here to see the video.

On China. China will grow faster than the U.S. is growing because China comes from a lower base, Buffett said. The U.S. cannot grow at the same rate as China.

"We ought to be happy that they're doing well," he said. "It's not a zero-sum game in the world. We do not want to be an island of prosperity among 7 billion people." But expect to see America's overwhelming dominance in the world diminish. Click here to see the video.

On the auto industry. Americans haven't lost their love affair with cars, Buffett said. People want to buy more cars, and the economy is coming back. There is an expected number of cars on the road for the American population, he said. We fell below that number recently but now we're coming back. Click here to see the video.

On schmoozing. Sucking up to Berkshire investors is not important, Buffett said. "What you want is people that understand you and your business and what you're about," he added. "The idea of trying to cultivate new people all the time, you know there's only so many seats in the church." Click here to see the video.

On insider trading. There's a fair amount of trading on inside information in Wall Street, Buffett said. "You can't make a deal without a certain number of people hearing about it," he added. That's why he keeps Berkshire acquisitions very quiet and he likes to get them done fast.

Buffett said he doesn't even tell his board of directors much about an acquisition until it happens. "I'm paranoid about the idea that if we have 20 people that know about something, one of them is going to tell somebody." Click here to see the video.

On railroads. Buffett has only visited the offices of Burlington Northern once since Berkshire bought it. Over the last year, he said, he is more appreciative of the competitive advantages of the rail industry versus a sector like trucking. Click here to see the video.

On electric cars. Buffett has invested hundreds of millions of dollars in BYD, the Chinese battery company that is looking at ways to power electric cars. Battery technology is an evolving and tough game, he said. "There are a lot of smart people working on battery technology."  BYD lost more than 60% from its peak. Click here to see the video.