I don't generally like Podcasts, but I'd recommend The AskHistorians Podcast!

New Books in History is one of the better examples of the digital humanities and does allow someone to get the gist of a major monograph if one is pressed for time. LSE has a number of good lectures if you can navigate their atrocious search function. The badly-named British outfit Backdoor Broadcasting also has some good lectures by history professors. Finally, BBC's In Our Time features some high-production values and informed guests.