I've been watching a channel called "Medlife Crisis". It's a side interest from a doctor working in a London hospital. In their own words: "I'm a cardiologist, internal medicine doctor & university researcher that makes science videos and bad jokes." A reliable source and also an excellent presenter.
Their latest video is on types of bias and how they can affect medical research. The title is a joke in itself, referencing a common way in which those biases are used - "9 Reasons Medical Research is Trash"
I think it's worth pausing on the fake newspaper intro screen, by the way.
I also like their "How Does Homeopathy Work?" video, which is a thorough and comprehensive analysis of the topic: