If your only limitation is the one-minute playback cap on mobile devices, you do not need a full Premiere subscription. You can purchase a permanent, one-time "App Unlock" directly from the Google Play Store or Apple App Store for roughly $5.00. This permanently unlocks unlimited playback for that specific device architecture without modifying your server features. Emby Premiere trial - Synology - Emby Community
To help you get the most out of your media setup, let me know: What do you plan on streaming your media to? emby premiere free trial
Emby currently offers a 14-day free trial of Emby Premiere for new users. If your only limitation is the one-minute playback