Resolution for TikTok, Reels & Shorts
Vertical 9:16 at 1080×1920 is the standard for TikTok, Instagram Reels and YouTube Shorts. Learn the sizes, the pitfalls and how to prepare a clip.
MP4 vs WebM
MP4 and WebM are containers, not quality levels. Compare H.264 + AAC with VP9 + Opus, compatibility and when each one is the better choice.
Why a video won't play
A video file can be fine and still refuse to play. Learn how codecs, containers and damaged files cause it, and what you can try.
Video guides
Short, practical answers to the questions people ask about video files.