![3girls animal_ears animated audible_music audible_speech backpack bag bangs bare_shoulders blunt_bangs bow bowtie commentary_request elbow_gloves food frills fur_collar gloves hat hat_feather head_wings helmet japanese_crested_ibis_(kemono_friends) japari_bun japari_symbol kaban_(kemono_friends) kemono_friends long_sleeves mp4 multicolored_hair multiple_girls pantyhose pith_helmet pleated_skirt railing sasakure.uk serval_(kemono_friends) serval_ears serval_print serval_tail shirt short_hair sidelocks skirt sleeveless smile tail two-tone_hair video_with_sound rating:s score:12 post #2666397](/cdn_image/preview/de/05/de053b59d4d111a347f8370cce7c32d4.jpg)
MPEG-4 Part 14 or MP4 is a multi-purpose container format based on Apple's QuickTime format. It is an ISO standard (ISO/IEC 14496-14). It can be used for audio as well as video. It is mostly used to contain H.264 (MPEG-4 Part 10) compressed video with/and/or AAC (Advanced Audio Coding) or MP3 compressed audio. Modern browsers can directly stream MP4 files.
H.264 is the most used video format for video streaming while AAC is the successor to MP3, being more efficient than its predecessor. MP3 is still by far the most used audio format.
This tag implicates animated (learn more).