: Open Telegram and type @LINKDEDEBHAIII directly into the search bar at the top of your chat list.
: Telegram supports the mp4 format natively. You should be able to stream the video within the app before deciding to download it to your device.
: If you download the file, it is typically stored in your device's internal storage under Android/data/org.telegram.messenger/files/Telegram/Telegram Video (on Android) or your "Save to Files" location on iOS. How To Find Channels On Telegram - Full Guide