How to share the slideshow I made from an album? Photos 8.0, 2017 5K iMac 27. latest Ventura.

Hello bennettfromca,

These steps from Export photos, videos, slideshows, and memories in Photos on Mac - Apple Support will guide you through exporting a slideshow made in Photos, that you can then share:

You can export slideshows to share with others. When you export a slideshow, Photos creates a movie file with the video format that you select. 

1. In the Photos app  on your Mac, click a slideshow under Projects in the sidebar.

2. Click Export in the toolbar, or choose File > Export > Export Slideshow.

3. Enter a filename for your slideshow movie in the Save As field.

4. Click the Format pop-up menu and choose a file type for the exported movie.

Standard definition (480p) is good for standard-definition TV. If the slideshow will play on a high-definition TV or display, choose one of the high-definition formats: 720p or 1080p.

5. Choose where to save the exported slideshow movie, then click Save.

Cheers.

Hello bennettfromca,

You could share the exported file directly from the location you saved in using Finder or using the QuickTime Player on your Mac:

Share your movies from QuickTime Player on Mac

When you share your movie, QuickTime Player creates a version of the movie that’s optimized for how you choose to share.

1. In the QuickTime Player app  on your Mac, open the movie.

2. Do one of the following:

* Choose File > Share, then choose how you want to share your movie.

* Click the Share and Playback Speed button , choose Share, then choose how you want to share your movie.

5. If AirDrop isn’t listed, your Mac doesn’t support it.

6. Note: If you opened a movie stored on iCloud Drive, choose Share File from the pop-up menu to share the item with other iCloud users. See Use iCloud File Sharing to share folders and documents with others.

You'll find this information here: Share your movies from QuickTime Player on Mac - Apple Support

Take care.