Bollywood is the sobriquet for India's Hindi language film industry, based in the city of Mumbai, Maharashtra.

It is more formally referred to as Hindi cinema.

The term "Bollywood" is often used by non-Indians as a synecdoche to refer to the whole of Indian cinema; however, Bollywood proper is only a part of the larger Indian film industry, which includes other production centres producing films in many other Indian languages.

Tamil (') is a Dravidian language predominantly spoken by the Tamil people of India and Sri Lanka, and also by the Tamil diaspora, Sri Lankan Moors, Burghers, Douglas, and Chindians.

Tamil is an official language of two countries, Singapore and Sri Lanka.

It has official status in the Indian state of Tamil Nadu and the Indian Union Territory of Puducherry.

It is also used as one of the languages of education in Malaysia, along with English, Malay and Mandarin.

Tamil is also spoken by significant minorities in the four other South Indian states of Kerala, Karnataka, Andhra Pradesh and Telangana and the Union Territory of the Andaman and Nicobar Islands.

It is one of the 22 scheduled languages of India.

The cinema of the United States, often metonymously referred to as Hollywood, has had a profound effect on cinema across the world since the early 20th century.

The dominant style of American cinema is Classical Hollywood Cinema, which developed from 1917-1960 and characterizes most films to this day.

While the French Lumière Brothers are generally credited with the birth of modern cinema, it is American cinema that soon became the most dominant force in an emerging industry.

Since the 1920s, the American film industry has grossed more money every year than that of any other country.

MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images.

Like most modern container formats, it allows streaming over the Internet.

The only official filename extension for MPEG-4 Part 14 files is.mp4.

MPEG-4 Part 14 (formally ISO/IEC 14496-14:2003) is a standard specified as a part of MPEG-4.

Dubbing, mixing, or re-recording is a post-production process used in filmmaking and video production in which additional or supplementary recordings are "mixed" with original production sound to create the finished soundtrack.