If I had to pick one, I would recommend the recent series by podcast TrueAnon on NATO. It's up to date and timely -- they discuss the context of Ukraine for example. Caveats are that it can be irreverent at times (if you can't tell by the name heh) and it has a severe left-wing tilt, although not to a delusional degree in my opinion. It's well sourced, and will give you the knowledge to follow up with your own research in those places you are skeptical.