I want to upload a video on YouTube and was wondering what file format would be best if I want to minimize carbon emissions?
Google says all emissions of its services are offset, so let's assume hosting the video does not contribute to its footprint1.
Carbon emissions will come from people streaming the video. I can reduce the amount of data that is streamed by lowering the video's resolution. But what exactly is the influence of video format here? Some video formats will reduce file size more than others, but on the other hand more data compression will result in more CPU usage to uncompress the data and show the video? How does this balance out? Is anyone aware of research done on this topic?
1 I realize offsetting emissions is not the same as having no carbon emissions, but let's keep things simple and leave this out of the discussion.