While some people are hard on videos and podcasts for not attributing where they get their information, many bestselling popular history books are equally shoddy https://historynewsnetwork.org/article/this-is-what-max-hastings-did-is-this-plagiarism-y (one explanation would be that Hastings' books are written by an army of anonymous research assistants who take shortcuts, and he does not know where their summaries come from)
