Warm and hot are not the same. We might say it's warm in the spring but hot in the summer. Boiling water is hot, not warm. This tea has probably been steeping for a while and now it's warm, so you don't have to worry about burning your mouth.
It's a matter of degree. Hot is warmer/hotter than warm. The tea would be warm if it's comfortable to drink and hot if it's steaming and you may have to blow on it a bit first to comfortably drink it. In German, hot is "heiß".
Guys, please do flag(report) this audio.
Firstly, warm sounds unclear
Also, secondly, in German, "ee" sounds like the letters ay as in "bay". So, Tee should sound like"Tay" and Kaffee should sound like"Kaffay"