Here's why:
* Licensing: BBC Motion Gallery clips are protected by copyright and require a license to use. WMM doesn't have the functionality to manage these licensing agreements.
* File format: BBC Motion Gallery clips are typically in formats like ProRes or H.264, which WMM may not support.
Here's how you can work around this:
1. Download the clips in a compatible format: Check the terms of use for BBC Motion Gallery to see if they offer downloads in formats like MP4, which WMM can handle.
2. Use a different video editing software: Consider switching to a more powerful video editing software like Adobe Premiere Pro, Final Cut Pro, or DaVinci Resolve, which can handle licensing and various file formats.
3. Find alternative royalty-free footage: If you don't need to use BBC Motion Gallery, explore other royalty-free stock footage websites like Pexels, Videvo, or Pixabay.
Remember to always respect copyright laws and ensure you have the necessary licenses before using any footage in your videos.