What is Video Shot Sequencer?
Video Shot Sequencer is a desktop helper for video editors who name their shot files by a strict numbering convention. It reads a folder of those files, groups them into shots, draws each shot as a row with a thumbnail of every file in it, and lets you drag shots into the order you want. When you commit, it renames the real files on disk so their numbers match the new order.
The thing it does that hand-renaming in Explorer doesn't: you reorder shots visually and it does the bulk renumbering for you, in one safe batch. Instead of working out which file becomes which number and renaming dozens of them by hand, you drag a row and the app rewrites every affected name at once — and it never lets two files collide mid-rename.
The folder on disk is always the source of truth. The app is a helper, not the boss: you can still rename files in Explorer whenever you like and pull the changes back in. The three things you'll do most are open a folder, reorder shots, and commit the result — each is covered below, along with the smaller tools for grouping, locking, numbering, and tidying up.