I'm not against people using Patreon and stuff.
I just want to introduce you to a better youtube app called NewPipe https://newpipe.net/
It lets you download videos and watch them later. You might find it useful. It's Free and Open Source Software and available on the FDroid App store.
In all seriousness if you want a good JCS replacement the latest Detectives Series is excellent and in the same genre as JCS.
The latest series (2020) - The Detectives: Fighting Organised Crime (use a proxy if your from the UK or something)
2017 series (gnarly af) - The Detectives: Murder on the Streets
Both these series are excellent and come with the highest recommendation from a JCS junkie. There is also a 2015 series I haven't watched yet. The 2020 series is better (so far), the 2017 is super dark and gnarly.