I really need to change my mind these days.
So here's a new #YunoHost
package I worked on: https://github.com/YunoHost-Apps/zusam_ynh
I'm installing this. Should be perfect to convince our grannies and grampas not to use WhatsApp or iCloud to send us pics or videos.
If you want to give it a try, the author has a demo website : https://demo.zusam.org/