A video supposedly revealing how to open any locked hotel safe is scaring some travelers.

Leo Lenier, who is based in Las Vegas, has gone viral after sharing a video showing why the safest place in your hotel room isn't necessarily the safe - showing just how easily it can be reset.

Revealing his discovery at the Kitsilano Business Leaders Meetup in the US, Whin-Yates demonstrated how to open a Sentry-brand safe without a code.