Vid-20230122-wa0373.mp4

Use a "mountain fold" (fold down) or "valley fold" (fold up) as indicated by dashed lines.

Slide the tabs of one unit into the pockets of the next—no glue is usually needed. VID-20230122-WA0373.mp4

Since I can't see the video, could you describe what the paper project is? Knowing the shape or function will help me give you the right steps. Common Paper "Put Together" Projects Use a "mountain fold" (fold down) or "valley