Downloading a file named typically refers to saving a video from the internet to your local device. How to Find Your Download
: This is a standard digital multimedia container format most commonly used to store video and audio.
Are you trying to find a you downloaded, or did you receive this as a suspicious text message?
: The "(1)" in the filename usually indicates that a file with the same name already exists in your download folder, and your system renamed this new copy to avoid overwriting the original.
: By default, downloaded files are saved in the Downloads folder, which can be found in File Explorer under "This PC".