All popular video sites hold for each clip more than one video files with different qualities (Youtube is the champion here - up to 38 qualities per clip). The program fetches complete list of available qualities with detailed info to make proper choice of what source to download according to your wish.

Available two complementary program versions: single and batch, both are actively developing. Single version (3D Youtube Downloader) designed as most compact and convenient way for downloading of one clip. On the other hand, if need to download a list of clips or whole channel, batch version (3D Youtube Downloader - Batch) is the ultimate choice.

3D Youtube Downloader
3D Youtube Downloader
3D Youtube Downloader - Batch
3D Youtube Downloader - Batch

Other features:

Both programs have simplest possible interface to give you full control over what you are downloading.