In an attempt to keep all my posts at least linked in one place, here are the two links to my series of posts:
Part 1 is on the current state of video, based on data from the HTTP Archive. There are a lot of very large videos being served to mobile devices… A full 49% of the videos analyzed are larger than 1080 pixels wide- bigger than most screens in portrait mode. 19% of the videos were identical on desktop & mobile!
Part 2 builds on the data from part 1 and outlines 9 best practices to optimise video delivery.