Updating Telegram for iOS seen problems with downloading videos on the avatar. Setup preview when you select the avatar is not working — the client puts the first frame of the video.
Workarounds: • Upload video avatar with Android or macOS. • When you create a video note that the first frame of the video will be the preview.
Why it matters: avatar preview channel is displayed and in the list of chats in the channel, and the old clients and channel information.