How to share Photos.app videos to YouTube directly?

Solution 1:

While such an extension doesn't exist natively in macOS, the desired functionality can be added with the support of a 3rd party app.

Video Uploader for YouTube is a macOS app which lets you easily upload your videos to YouTube.

The app also installs a Finder and Photos.app extension which lets you upload to YouTube directly from Finder or from within the Photos app.

Solution 2:

Well, you could always import them into iMovie which allows sharing to YouTube.

• Start in iMovie and create a new project.
• Navigate to Media, you will see Photos as a Media source.
• After finding the clip, drag it to the editing area of iMovie.
• Share using share icon in the upper left, YouTube would be a selectable choice