You should not build this. It is impossible to complete, so why bother. The picture is probably photoshoped to show it working, as is this video:

If you want pain in your life, do not read the datasheets. They contain very sad information. The pictures are also miserable. You have a 50-50 chance of getting the alignment right, so why even try?

Soldering by hand is impossible, so don't even try. It will only make you rant. It is unlikely that this video will help either:

Attempting to programming a surface mount chip will leave you in tears, even if someone depressingly designed an ISP header into the circuit for you. You certainly don't want to use anything to make it easier like https://www.tindie.com/products/MakersBox/yet-another-programming-shield/ or https://www.tindie.com/products/nsayer/avr-isp-pogo-adapter-kit/.