SAN FRANCISCO --A business traveler has posted a video to YouTube that reveals a default password for some safes in hotel rooms.The traveler, who posted on YouTube as "SkyRangerPro," said he first became aware of the problem when he forgot the password he created for the safe in his room. He called the hotel's front desk for help. "They just entered their default, which happens to be all zeroes," he said. "That's the default password on the safe. So, all zeroes opens it, which means it's not too safe." The hotel whistleblower says he's not trying to encourage theft, but says he wants people to be aware of the flaw and test the default password before they leave anything too valuable in hotel safes. According to the man, the same problem has been duplicated at several hotels over the past few years.