For those wondering about MPEG-2's applications (compared to, e.g., MPEG-1 and MPEG-4), it's the primary standard used for DVD-Video. Blu-ray makes some use of MPEG-2, especially for the FBI warnings, but it's not too popular for the actual features. It's also used in ATSC and DVB broadcast video, but I'm not sure how popular it is compared to MPEG-4.