IT-Media

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