The original ESO press release is probably a better link, as the phys.org text mostly just a small bit of context but doesn't include the "before" pictures or links to any further details.
Here is the direct YT link (from your article): https://youtu.be/o1ls7Gr9LTE
This truly seems like a completely massive change in the observable characteristics of the star especially on such a short timeframe. 36% dimmer in 12 months? I'll be really interested to see if we can find out for sure what's happening.