On this line I'm completely obsessed with the youtube channel History of the Universe: https://www.youtube.com/channel/UCtRFmSyL4fSLQkn-wMqlmdA

I'm very much a layman, but they're really fantastic long form videos and part of what makes them so engaging is they cover not just our current models and theories, but the evolution of those models and the stories of the scientists that made the discoveries. Top-notch content all around and for all the research involved they put out new videos pretty frequently too.