Video

MP4 with H.264/HEVC is the safest choice for smooth playback on iPhone and Android; use MOV for editing and MKV for archiving and subtitles.

Match file format, codec, and compression to your goal—save storage, preserve quality, and ensure playback across devices.

How MP3, JPEG, and MP4 use lossy compression to shrink files, common artifacts to watch for, and why you should keep lossless masters for editing and archiving.

Compare MP4, MOV, and AVI by file size, quality, compression, and device support — learn which format suits streaming, editing, or archiving.