У вашего броузера проблема в совместимости с HTML5
Today I make a hollow punch for stamping holes in thin materials like leather, cardboard and other cloth like materials.
Check out my recommended tools/gear section:
https://www.amazon.com/shop/torbjornahman
If you like my videos you can support me at:
https://www.patreon.com/torbjornahman
.. or buy a T-Shirt here:
http://www.torbjornahman.se/tshirts