Guides
Practical guides to video sizes, quality settings and sharing limits, written by the people who build Video Compressor.
- How to compress a video small enough to emailEmail attachments are capped at around 25 MB. How long a video fits, which resolution to choose, and how to get a clip small enough to attach.
- What is CRF? Video quality settings explainedCRF (Constant Rate Factor) controls quality in H.264 encoding. What the numbers mean, which values to use, and when to use a target size instead.
- Why are iPhone videos so large?iPhone videos are big because of 4K, high frame rates and HDR. What HEVC and Dolby Vision mean for compatibility, and how to make iPhone videos smaller.