Small update:
I am now at 51 hours. I’ve watched all the complete beginner videos once and am currently on the second round where I’m repeating everything again but also adding beginner videos to the playlist.
I will now adjust my strategy a little. Before, I usually watched around 1-2 hours a day. During that time, I was always 100% focused on the videos. But I will now try to increase my immersion. As I work from home, I can easily leave the videos running in the background for 3 to 5 hours. I just need more input, as Japanese CI is already difficult for me.
I also notice that I keep trying to translate things in my head, sometimes in German and sometimes in English. 
I just hope that with more input I will be better at just watching the videos.
The grammar and all the word endings. 