Clips won’t let me add video or photos…help!

If Clips is not working right:

You might want to try:

closing Clips: Close an app on your iPhone or iPod touch - Apple Support

restarting your iPhone: Restart your iPhone - Apple Support

re-opening Clips,

trying again.

Else:

If you need to become more familiar with using Clips:

There is a user guide online:

Clips User Guide – Apple Support

NB: You can click on "Table of Contents" at the top of the page that opens from the above link, to see various topics, leading to detailed articles that can guide you.

All the best :-)