On YouTube’s Mass Page Tools “Domain Investing 101”. Sep 18, 2021, (~49:31), Daryl mentioned acquiring many domain extensions with his first name (.sale, .pics, .photo, .partners, .news, .media, .domains, .coupons, .cash, .photos, video, vip, tools, .link, .shop, . coupons) to brand himself as someone they know. He mentioned such names are short and easy to spell, like a bookmark. For example, “Go to Daryl.video” and they can get to his YouTube videos.
With this in mind, I put my 4-letter first name into ExpiredDomains.net to see if there were any available extensions. It appears there were 162 registered TLDs (About 32,223 Domains with my first name in them). I applied a filters “max length = 4” and “available”, which today brings the list down to 6 available domain extensions (.si, .gd.cn, .am, .org.cn, .co.at, .co.ke).