A recent post regarding tele lens quality discussed some issues with still images and I began to post this but this is really about video. It may apply more to some of the older drones but it also applies to those that shoot 4K but output HD. Why would you ever do that? One reason is to be able to crop. If you shoot 4k and know you only want to output HD you can zoom into an HD area of a 4K video without losing quality. You therefore, in effect, have a longer telephoto ability. The other reason is to save bandwidth for sharing. In any case, The sharpness of the final YouTube video is obviously affected by a variety of things down the workflow pipe. One of the stranger things is that better youtube results are obtained by uploading 4K video even if you shoot at a lower resolution. It is better to convert HD to 4K and upload as 4K than it is to just uploading the original HD. I can’t recall the explanation for why that is the case but I viewed a fairly long video explaining that entire thing. I‘m always shooting 4K so I have not tested this out but the explanation made sense when I watched the video. Had anyone told me this before viewing the explanation video I would have gone into an explanation as to why that made no sense. (As an aside, DNG stills should always undergo sharpening.) I wish I had a reference for the original video that explained this because, as I said, it doesn’t make logical sense to me but has to do with how youtube treats video so uploading an HD video will result in a lesser quality youtube video than one shot HD, then upgraded to 4K. As I often say, “it’s all voodoo magic”. ( I actually used that phrase just this AM when my wife couldn’t get on the net here at home. It was a 10 second fix that made no sense)