A tour does not have to start from photos. Step 01 also offers the clips already in your account, so if you have scenes you like from earlier tours you can stitch a new video out of them without animating anything again.
Where the clips are. They sit in the same grid as your photos on Step 01, sorted in with them by date. The Clips filter in the toolbar above the grid narrows the grid to clips only, which is the fastest way to find them in a large library.
Reusing a clip is free. A clip you already own is already rendered, so nothing is generated and nothing is charged. Where a tour built from photos spends credits animating each scene, a tour built from clips spends none: the only work left is stitching them together.
The first thing you pick decides the tour. Pick a photo first and the tour is a photo tour. Pick a clip first and it is a clip tour. The two do not mix, so once there is something in your tour the other kind greys out, and a greyed tile tells you why when you hover it. Nothing is hidden from you, and anything already in your tour stays live so you can always take it back out. Empty the tour and both kinds are on offer again.
Motion is skipped. Step 02 is where a photo is given a camera movement. A clip already has one, so a clip tour goes from Select straight to Opening.
Any clip works in any shape. The orientation you picked before the builder opened is the one you get. A clip takes its shape from the photo it was made from, not from the tour it came out of, and the stitch crops every scene to your canvas the same way it crops a photo. So a clip is pickable in a 9:16 tour exactly as it is in a 16:9 one. Vertical is the tightest crop of the four, so a wide scene gives up the most width there. Step 05 plays each clip before you commit, which is the place to check it.
Everything else works the same. Your Opening and Closing cards, pacing, naming, and the Review summary are unchanged, and the same twelve-scene limit applies. Step 05 lets you play each clip before you commit, reorder them, drop one, or add another.
This is also the easiest way to re-cut a tour you already paid for: start a clip tour, pick the scenes that worked, and give them a new opening, a new closing, and a different pace.