Within Wikimedia, images are said to be uploaded in the highest resolution possible. This works fine with thumbnails of images in articles. But highest resolution possible should be a rule for videos too. However, if one uploads a FullHD video a puts it into an article on Wikipedia, it is very bandwidth demanding to play it (not very nice for mobile viewing for instance). In articles, low bitrate videos are preffered. Today, you have to upload another low-bitrate file yourself if you want to have SD version in the article. I propose automatical creation of lower-bitrate (lower resolution) video versions that can be used to play within articles. While FullHD is 1080p, the SD versions might be 240p or 360p. The call for SD version might be an extra parameter in [[File:]] tag or it just could be set by default for the in-article thumbnail video version.