Stefan Milo has a lot of really great content ranging from prehistory to antiquity.

These channels have a focus on intellectual and social history:

Al Muqaddimah Islamic history

Alki organized labor history

Art & Context art history

J. Draper UK-centric critical history

Kings and Things history of architecture and media

Land and Lore environment-related history

Let's Talk Religion obscure history of religion

Medievalists

NORTH 02 prehistoric and ancient

Premodernist

The Histocrat

The Lore Lodge often tackles native American history

Unseen Japan obscure history of Japan

Voices of the Past historical first-hand accounts

History Matters is good, very short and to the point videos about interesting topics

Ancient Americas and Premodernist to add the list

The History Guy. About 80% of his videos are non-military history.

Historia Civilis is great, he has covered plenty of Roman history, but he's also currently doing a series about post-Napoleonic Europe and has done a number of really great one-off non-rome episodes

One of my favorites: https://youtu.be/hvk_XylEmLo

Fall Of Civilisations one of my favs because it goes into everyday life for people in these societies and he paints a really good picture.

the videos are just supplementary but would highly highly rate

Atun-shei films, his long running series Checkmate Licolnites! is top tier. Has a couple videos about New Orleans and New England

Miniminuteman- zoomer til tok archeologist and conspiracy theory debunker

Bill Wurtz- meme videos

Edit: Cambrian Chronicles- highly specific Welsh history/myth debunking