The video says that the Hives' internal climate is "relatively (to the outside?) dry and warm", from memory isn't the relative humidity around 75% to 80% in the brood area and it would be higher in the upper honey areas?
The vapor barrier mentioned, wouldn't that then just take the needed moisture away from the brood area... the humidity *inside* the cell needs to be I think 95% for a 99% successful hatching rate.
Also they mention Book Scorpions (Pseudoscorpion), even though research has shown they devour Varroa mites, further research has also shown that they avoid any area where the honey bee frequents, so they are not able to fight varroa mites as is being implied.
FINALLY they have raised €91,957 ... with "191 backers" does that mean that the average donor has given €481.45 ??? They appear to have only had an original target of €9,144 ("pledged of €9,144 goal")
OK full disclosure, whenever the internet came out I couldn't initially see the fuss, now I do, but when Twitter, Pokemon and other bizarre stuff (what the heck is Candycrush and TikTok all about) came out I have never understood it, is this an internet thing that has gone over my head again?