Now that the adapted Blink.ino is on the ATtiny85, we need to verify if it works in a target environment. Power down your programmer and remove the ATtiny85. As an emulated target environment, you can use either of the test designs. Place the ATtiny85 in your target environment and provide power to the setup.
The video shows both test setups, each with a ATtiny85.
Assuming you followed along with this series of blog posts and reached this point. Congratulations! You now have a working programmer based on a Nano, burned the bootloader, ported a sketch, successfully installed the sketch and tested it on an ATtiny85.