Main

vcodec: Video Codec (av01 > vp9.2 > vp9 > h265 > h264 > vp8 > h263 > theora > other)
acodec: Audio Codec (flac/alac > wav/aiff > opus > vorbis > aac > mp4a > mp3 > ac4 > eac3 > ac3 > dts > other)

Container

Top Tier (most common)

MP4 (.mp4) – most compatible (web, mobile, TVs, browsers)

MKV (.mkv) – most flexible (multiple audio/subtitles, any codec)

AVI (.avi) – old, still seen, limited modern features

MOV (.mov) – Apple / QuickTime ecosystem

Streaming & Web

WEBM (.webm) – web-optimized (VP9/AV1 + Opus)

M4V (.m4v) – Apple variant of MP4

3GP (.3gp) – legacy mobile video

Professional / Broadcast

MXF (.mxf) – broadcast & production

TS (.ts) – transport stream (TV, IPTV)

M2TS (.m2ts) – Blu-ray transport stream

Audio-focused Containers

MP3 (.mp3) – audio container + codec

M4A (.m4a) – AAC/ALAC audio

OGG (.ogg) – Vorbis/Opus audio

Disk / Archival

ISO (.iso) – disc images (DVD/Blu-ray)

VOB (.vob) – DVD video

Quick summary

Maximum compatibility: MP4

Maximum features: MKV

Web streaming: WEBM

Apple ecosystem: MP4 / MOV / M4V