Didn't watch the video.
Kraken exchange owner once said that the Tether prints coincide with increased inflows of FIAT deposits to their exchange and he deems Tether legitimate.
Anyways Tether has been used for years to cause fear, uncertainty and doubt. Look at the timestamps of when the tether news were being released - most of the time it's at market bottom.
If you trade based on that information, you are just being played by whales.
There probably will go something wrong with Tether at some point, but by the time it happens you will have lost so much money trying to make it happen, that you will give up on the narrative. So that when it actually happens, you won't be able to act on it, you might even go long bitcoin and be bullish at that point.
We are all trying to be smart, but it's wrong. Be dumb, follow the price.