If you’re ok with just file storage sftpgo has been solid for me for years now. Does sftp ftp and WebDAV (like nextcloud). Webui isn’t as pretty but it’s fast. Mobile apps will be various sync apps with sftp or WebDAV support. On Android folder sync pro is pretty good for keeping documents and pictures backed up
Ah you’re probably right about the mobile clients. I’m not a mobile watcher really. I can say though that the jellyfin desktop app and jellyfin mpv shim both have skip-intro integration, though I’ve only tested it with jellyfin MPV shim.
Skip-intro is an unofficial plugin ATM but can vouch that it works decently well. Can’t compare it to the Plex implementation since it has been quite a while since I’ve had Plex deployed.