Ok, sure, they also produce extra h264 files at various resolutions and quality levels. Transcoding can't invent quality that wasn't there in the input, so I do

Ok, sure, they also produce extra h264 files at various resolutions and quality levels. Transcoding can't invent quality that wasn't there in the input, so I don't see how that changes anything. That 2.5mbit/s upload they accept is therefore the ceiling.