They also fired pew-pew lasers like some terrible B grade movie props when thargoids are well known to use cannons (specifically a form of multis). It seemed like whoever made that video was just given some basic footage and told to stitch it together without being very well informed about how thargoids actually behave, with the result being laughably poor.
The thargoids you encounter in the system still behave the same as always.
Which who is to say that the whole thing wasn't a set-up? The whatever his name is that was running that trainwreck had been tampering with Human / Thargoid hybrids for some time. Considering the attacking thargoid vessels during the firing were very few in number, and certainly operated outside of the usual thargoid SOP's, it could have been possible that they were not thargoid in the sense we know. False flag basically. Humans wouldnt know how their systems operate, however I am sure if you fit wings to a dish washer someone will figure out how to fly it, and know how to operate burst lasers. Staged event which can be used as a galactic disaster to garner funding and aid.