Why iPhone Videos Silently Fail as Telegram Video Avatars

The Silent Failure Nobody Explains I was setting up a Telegram video avatar and uploaded a recent iPhone clip. No error, no feedback, just the upload spinner disappeared and my profile photo stayed the same. Tried again. Same result. It took about an hour to figure out. iPhone records HEVC (H.265) by default. Telegram's video avatar API silently rejects it. No error message, nothing. What Telegram Actually Requires The spec for video avatars is specific: Codec: H.264 (not HEVC/H.265, not VP9, no