I'm excited about this. In Big Sur you'll be able to apply lighting effects, filters, crop and rotate VIDEOS in the Photos app. Basically, the same things you can do with Photos, you can do to an entire video. This means a lot of what people do with videos in iMovie and other tools can now be done right in Photos if you already have your videos stored there. This was added to Photos in iOS 13, but for some reason macOS was left out.
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