Supported format url:
In order to download videos from Twitter on iPhone or convert Twitter to mp4 you need to use twitterfk.com website. With iOS 13 and newer, you can save videos from online resources only in Safari web browser. For iOS 12 and lower, you can download videos only with help of "Documents by Readdle Inc." app from the Apple App Store, by using the built- in browser and our website.
The process is simple. You will have to copy the URL of the tweet with a video from the Twitter application or open it in a web browser. Tap the share button, and find the Copy Link item in the popup menu. Copy the URL, then go back to twitterfk.com and paste the link in the form on top of the page. Hit the download button, and you will get the links for downloading in a couple of seconds.
By default, the downloaded files are stored in a default browser folder called "Downloads". This folder is usually stored in the "Documents" folder on your desktop device (Windows, macOS, Linux, and others). Press CTRL+J on Windows or CMD+J on macOS, to open the download history of your browser, there you can find the files you downloaded earlier.
To find this folder on your iPhone or Android, just tap the folder name on the search bar of your phone or tablet, please do not confuse the search bar of the phone with the search bar of the search engine.