Sites like SaveFrom.net or SnapSave allow you to paste a URL and choose MP4 as the output format.
If the video is on Instagram or TikTok , you typically need a "downloader" tool that handles those specific links. Download Art ♥️ (MP4) mp4
Only download content that you have permission to access or that is under a Creative Commons license. Sites like SaveFrom
For desktop users, extensions like Video DownloadHelper for Chrome or Firefox can detect MP4 files on most pages. Download Art ♥️ (MP4) mp4
Open your chosen tool and paste the link into the search/input bar.