The process of making a high quality wine barrel is still done very much by hand. Each piece of wood is hand selected, even from the point of purchasing specific logs at auctions. In this video he is using many power tools and modern techniques, but still performing everything himself. I couldn’t find any videos of coopers using only hand tools, let me know if you find one.
This video is rather poor quality, but many more hand tools are used in the process.
Just in case you’re curious, here’s what the factory style production of these things is more like.