(without having watched the video)
Yes. Use a full-colour printer and make sure your cards are legible. Support your game store / play space by buying something from them every time you visit or even just donate a small amount to them if they don't have a entry fee. No-one needs to be paying more than €1 for a piece of cardboard when a printer proxy is functionally identical. And I absolutely prefer proxies to foreign-language cards which some people buy because they're cheaper than English. At least a proxy you can read and know what it does.