Step 1 :
Go to your Twitter Account and choose from any tweet any Video or GIF image and Right click with the mouse on the video and select [ Copy Video URL ]
Tweet video example
Tweet GIF image example
Goto TWSaver.com and Paste the copied URL in the form and hit download button
Step 3your download links ready and you just want to choose your perefered video quality you need to start download in you PC.
Tweet video download links
Tweet GIF image download links