Here are some I enjoy. All have a good voice, not overly expressively and no sudden change in background tracks. No sudden screaming/explosions/anything that will wake you.
John Michael Godier Science/Speculative Scifi, Low Soothing voice, even has a sleep playlist.
Issac Arthur Sci-Fi, Calm voice, Good background track, Long Videos
Forgotten Weapons Firearms, Historical and Mechanical overviews and indepth discussions. I recommend you skip the shooting range stuff if you’re trying to sleep.
It grabs attention. Tell everyone the world is getting better daily, the long term trend of violent crime and war is actually trending downwards. We are making progress towards elimination of diseases, hunger and poverty. No one bats an eyelid. Say the world is verging toward WW3 and imminent destruction is here and everyone pays attention to you.
Its easy to be in a fatalistic mindset. Its easy to say its all going to shit, What’s the point? It’s difficult to be positive. Its difficult to take action. No matter how small. Its difficult to see the ultimate impact of small positive acts. But every small act can and does make a difference. At least to the person it benefits. Its even more difficult to face the fact that all the positive can be easily undone by one guy pressing a button. Its difficult to keep trying despite that fact.