Just seen and ad on Farcebook for a mini chain saw, the one in the filmed
demo is a STIHL made unit, but when you go to the shop page to purchase
the item shown for £29.99 it is a GTA 26 with no STIHL markings at all.
Header says 2020 HOT SELLING-GTA 26 Battery-Powered Wood Cutter. For that
price I expect it is a Chinese copy.

Interestingly when you pause the demo video, the demo screen goes black,
so I recorded it with a screen recorder.