How Do I Share a Dynamic Apple Photos Memories Album

Gary, the Apple-created MEMORIES Albums feature of PHOTOS offers great potential for sharing. I find that when the album is run on either my desktop or mobile devices, the display is a full featured slideshow video with music/theme/scrapbook format. But using the share option, the recipients seem to receive/see only a static album without the video theme, music or format. There is an option for recipient to download the MEMORIES album, but from what I can see, it is still downloaded as a static display. Have I missed something?
Related question…is there a shelf life to the MEMORIES albums? Share recipients receive notice the iCloud link expires after ~60 days. Are MEMORIES albums on my systems removed from access over time? If I attempt to share an album I received after 60 days, will it be available to share?
Running High Sierra on 27″ – Retina 5K (late 2015) Photos 3.0 – I have two desktops and only one would upgrade to Mojave.
As usual, your thoughts are welcomed…Hal
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Hal Plimpton