With the Windows 10 Photos app set as the default image viewer, when you right-click on an image or video file (or a group of files), you’ll see the Create a new video option in the context menu.

The Create a new video option lets you create a video clip from the list of selected image files, and optionally export the video file or save to your OneDrive account via the Photos app.

This article tells you how to remove the Create a new video option from the right-click menu if you don’t use it and would like to declutter the right-click menu.
Read more