[Kaskade]

Yes I can see that video via YouTube in Kodi too. Double check your birthday is set correctly here: https://aboutme.google.com/

More info here: https://support.google.com/youtube/answer/3159776?hl=en

NOTE: it also says you need to sign out and sign back in after updating your age/birthday.

Also I guess there is the possibility that restricted mode is enabled somewhere/somehow: https://support.google.com/youtube/answer/174084?hl=en

OK, seems to be fixed. What I did :

Set my birthday date as public, and year as shown (It was set to private and therefore not shown by default).
Reboot my mobile phone, as I don't know how to log out on a Google account on an Android. (Maybe this one's the key)

Disconnect and click on Register again in the YouTube add on.

Well, not so easy to get it, but at least it's not an issue with the add-on. Maybe some explanation somewhere to make things easy.

Thanx a real lot!!!