Youtube, VPN +georestriction

[Helsinki]

Hello. I watch the German TV series "Notruf Hafenkante" on Youtube.
Some episodes of this show are geo-blocked although my Youtube account is located in Germany.
Sometimes Express VPN can overcome this block, other times not. (I set the VPN to a German location).

Does anyone know
1. why the VPN only sometimes works?
2. Can I change something on Youtube to overcome the geo-restriction?

For some reason, none of these episodes are geo-blocked on dailymotion.com

Thanks in advance.

[Nilero]

Strange... Which city in Germany does it connect to do you know?