I recommend Sean Carroll’s “Biggest Ideas in the Universe” series on YouTube for modern physics. He’s a professor at CalTech. Each is 60-90 minutes with an accompanying 60-90 minute Q&A—don’t miss the latter, they’re just as interesting. You won’t get a PhD after watching them but he gets a lot mathier than e.g. a Kurzgesagt video while only assuming a high school education (basic calculus, trig, vectors).