https://t5o.de is the Short URL service currently running on YOURLS https://yourls.org/ the homepage https://t5o.de redirects here temporarily, since t5o is the short name of https://triple5.org, which is currently not having any content. Triple5.org used to be the very personal blog that showed all about it's owner, but it will probably be online again one day.
So long look at the contents of https://mentalitea.com/blog