3GP and 3G2 - Wikipedia
https://en.wikipedia.org/wiki/3GP_and_3G2
3GP (3GPP file format) is a multimedia container format defined by the Third Generation Partnership Project (3GPP) for 3G UMTS multimedia services. It is used on 3G mobile phones but can also be played on some 2G and 4G phones.
Фильмы 3gp для мобильных и смартфонов
http://one3gp.ru/
Кино в 3GP » Приключения. Шерлок Холмс / Sherlock Holmes (2009) (ФИЛЬМЫ 3GP-MP4-AVI). Кино в 3GP » Приключения.
3GP File Extension - What is a .3gp file and how do I open it?
https://fileinfo.com/extension/3gp
A 3GP file is a multimedia file saved in an audio and video container format developed by the 3rd Generation Partnership Project (3GPP). It stores video and audio streams that are transmitted...
3GP File (What It Is & How to Open One)
https://www.lifewire.com/3gp-file-2619274
A 3GP file is a 3GPP Multimedia file. A 3G2 file is similar but with limitations. Here's how to open both kinds and convert one to a different format.