Idk why you’re being downvoted for this comment but it’s actually a really cool sleight of hand trick where the guy pouring the water gives it a small swirl in the direction they want the water to drain.
A lot of people may not like him but Mark Rober did a video about it: https://youtu.be/M7-h3FO-KKo?t=729&si=DoYwXCutiNvF_WcZ
To be fair I had to look it up too. Seems the Coriolis effect COULD impact a perfectly still container of water that was opened suddenly, but other forces are going to be significantly more impactful on a small body of water.