If the video is within a restricted or "content-protected" channel where downloading is disabled:

Historically, some vulnerabilities (like "EvilVideo") allowed attackers to disguise malicious .APK installers as .mp4 video previews. Always ensure the file extension is strictly .mp4 and do not install any software if prompted to "update your player" to view the content.

Before opening any file from a public or unknown Telegram source, prioritize security to avoid potential malware disguised as media.

If the "Save" option is missing, it means the channel admin has enabled content protection. You may need to use the Telegram Web version on a desktop to attempt a manual save or use third-party tools like the Telegram Video Downloader extension. 3. Resolving Display Issues If the video does not play or appears blurry: