What is this weird yellow train in Hamburg, Germany？

I found this weird yellow train at Hamburg's main station. It's only two cars long, made out of heavily altered old coaches, and is being hauled by a locmotively more commonly found in Austria. And of course, no (public) passengers are allowed on board. So what is this strange train? What does it do? And why might we go to Prague? Find out in today's video, once again featuring both Alexander the Gander and ‪@hammi-meow‬! Check out the merch store here: https://tftsb.myspreadshop.de/ I have a Patreon now: / tftsb I also have a Ko-fi: https://ko-fi.com/tftsb Also, check out my Discord: / discord Or if you'd rather, join the server via Stoat: https://rvlt.gg/Ajb872Gd Check out our Telegram channel: https://t.me/tftsb And listen to the Speedrun podcast here: https://speedrun.podbean.com/ Time Stamps: Coming Soon Music: Coming Soon As for references (even though I know a lot of this was anecdotal), I've compiled them all into a neat Google Doc: All clips used either with permission, under fair use, or under creative commons.