Comment by mrlyc

Hacker News, The Register

Reddit

    Documentaries from https://www.reddit.com/r/Documentaries/new/

    Lectures from https://www.reddit.com/r/lectures/new/

YouTube

    Subscriptions from https://www.youtube.com/feed/subscriptions/

I download the videos, convert them to MP3s then add them to the podcasts I've downloaded.