When attempting to download a playlist of many files from YouTube, Download Video often fails, presumably due to too many connections. If you download a playlist for example that has 100 items, Download Video takes a while pre-processing all the files in the list, getting thumbnails. If I just add the playlist and immediately start the download, typically several downloads will fail. Please add an option to limit the number of connections, so that Download Video does it's preprocessing step first (if necessary) gathering thumbs and whatever else it's doing initially, then downloads the videos sequentially from the playlist, one at a time. I'd rather have the download be reliable vs faster. It will also be very helpful if the files are prefixed with the playlist item number (see my other feature request on this forum)