This ambitious project deserves a mention: Mediakraft Networks has launched a video series on Youtube that will document how World War I unfolded, week-by-week, over a four-year period, from 1914 to 1918. A new video will be released every Thursday, and it will reflect on what happened during the same week 100 years prior. Launched in late July, the series has already covered 16 weeks of The Great War, with latest video showing how World War I became a defensive war and trenches began to scar the land. Hosted by Indy Neidell (read an interview with him here), each video features archival footage from British Pathé, the newsreel archive company that put over 85,000 historical films on YouTube earlier this year.
You can watch all 16 episodes above, along with a few helpful primers that explain why the War started in the first place. To view new videos as they get released, keep tabs on this Youtube page. There should eventually be close to 300 episodes. Quite an undertaking!
As a side note, I noticed that a Dutch podcast (in English) will cover "The First World War in 261 weeks." That's the title of the podcast itself. Find it here.