For those interested in the WWII period, Twitter has a "RealTimeWWII" account, run by a gentleman who works at the Museum of London. His account features daily, sometimes hourly updates, following the actual timeline of wartime events. I believe he did the entire war period in that manner once before, now he's running through it a second time with further details added.
On YouTube, this guy posted an extensive archive of radio broadcasts from WWII, everything from Hitler’s speeches to the whole day D-Day coverage from CBS News.......
Here is one such link, you can easily find the others from there...
https://www.youtube.com/watch?v=rT9uTYxhzYk