In the following video segment from this week's Week in Review, host Chris Hill sits down with Motley Fool analyst Austin Smith to talk about Warren Buffett, and his electric car company holdings. With shares of Tesla Motors (NASDAQ:TSLA) having exploded upwards of 365% in just over the course of the past year, many investors are kicking themselves for not having gotten in on this one earlier, and some have asked why this never became one of Warren Buffett's holdings. Austin discusses the battery and electric car company Buffett did buy years ago, and the traditional automaker he upped his stake in recently, and tells us why Berkshire Hathaway (NYSE:BRK-B)(NYSE:BRK-A) shareholders can be very happy with both of these buys.