Century 21 and its public relations firm, Mullen, have put up a whimsical YouTube video celebrating the sleep-inducing effects of tryptophan (the naturally occurring amino acid that’s found in turkey meat) that “doesn’t seem to have much to do with real estate,” Adweek says. The video has garnered nearly 90,000 views in two days — the biggest response to a Century 21 YouTube video since the franchisor’s Super Bowl commercial, “Wedding.” The takeaway for all marketers: Amusing content does not have to double as a sales pitch. Source: adweek.com