MOV is Apple's QuickTime container format — and the direct historical ancestor of MP4. When Apple released QuickTime in 1991, the .mov format defined the structure that MPEG-4 Part 14 (.mp4) later adopted in 2003 with minimal changes. Today, MOV and MP4 are technically very similar containers with similar internal structure, similar codec support, and similar feature sets. The differences are subtle and mostly affect specific professional workflows.
In practice in 2026, MOV survives mostly in two specific niches. The first is Apple's professional production ecosystem: ProRes video is typically packaged in MOV (Apple's natural container for its own codec), and Final Cut Pro, Logic Pro and other Apple Pro Apps default to MOV for output. The second is camera capture: many high-end cameras from RED, Blackmagic, Canon, Sony output MOV files because that's been the broadcast and cinema-camera tradition since the QuickTime era. Anywhere you receive material from professional camera operators or Mac-based editors, you'll see MOV files.
For a product team, MOV is almost always an ingest concern, never a delivery one. The transcoding action depends on what's inside. If MOV wraps a delivery codec (H.264, HEVC), the right action is to transmux to MP4 — it's just a container change, takes seconds, no quality loss. If MOV wraps a production codec (ProRes, DNxHR), you need to transcode to your delivery codec, taking real CPU time and producing a smaller, streaming-ready output. The decision is the same as for any production-format ingest: keep the MOV master in archival, deliver the H.264/HEVC/AV1 transcodes to viewers, never ship MOV directly to streaming because not enough non-Apple devices support it correctly.
