^^^ I think that video was one that someone on a bicycling forum did as part of a discussion. They were later told by someone else there that they hadn't pushed the plug in far enough. I can confirm when I received mine the other day (even before that video), I thought I had this exact same issue. But then I tried pushing the plug in much harder than I normally would do and found it went in further and then all was good. (FYI in the other forum it was said that the O-ring on the plug has to be pushed in past the O-ring in the jack.)
I had a 'gotcha' moment with mine on a ride last night. I kept pushing the switch to get to a different mode but nothing would happen, it seemed frozen as far as brightness mode changes. Yet double-push would get it into flash mode, and a long push would still turn it off. Later I figured out the problem - only a very quick push/release on the switch will change the mode, a slow one doesn't do anything. This is probably because it takes a long push and hold to turn it off, so what I was doing was too close to that. I hope this information helps anybody else who might think that their unit is 'frozen'.
Now that I figured out above I am loving this light. Sorry, I am not set up to do beam shots etc.., but I can say the light tint is pleasant and the burst mode is great, it is soo convenient having that button right by my thumb. I do have some other bike lights (old magicshine 808, 872 and Fenix BT20 - lately have been using either pair of Nitecore SRt7s or Chameleons on the bars) but this BC30 is going to be my new main light. I hope to set up with the different lights some night soon and offer up some descriptions.