Upload it to Google Photos or iCloud to free up space on your phone [3].
Transfer the file to a PC/Mac and use a media player like VLC Media Player or the default Windows/QuickTime player. 3. How to Fix "File Not Found" or "Cannot Open"
Search for the filename specifically in your device's file manager app. 2. How to Play Mobile: Use your phone's default Gallery or Photos app.
You can share this .mp4 file directly from your media app to other applications (Email, Drive, Telegram, etc.).