Tap the three-dot menu on the video message and select "Save to Gallery" or "Save to Downloads."
Some Telegram bots are designed to "mirror" or forward content from restricted channels to a private chat where downloading is enabled. Security and Ethical Considerations
Right-click the video file and choose "Save File As..." to specify a destination on your hard drive. Downloading from Restricted or Private Channels
Always ensure you have the right to download and distribute the content, especially if it belongs to a private educational or professional community.