iMovie media turned red on edited video
Using iMovie 10.4.1
I have almost finished editing a video. I shut the project down and came back to it later only to find almost every clip in timeline is red.
I have tried restarting, option/command start and nothing seems to bring the clips back. They are showing in media for the project. Any help very welcome.
MacBook Pro M1 2020 - 14.2.1 (23C71)
iMac 27″