Let me think of something that adds value without complicating the site. Since buffering is a common issue, perhaps a "Buffer Until End" feature where the user can set the video to buffer the entire content automatically in the background before watching. That way, they can watch without interruptions later.

Let me structure the response: explain the feature, how it works, user benefits, technical feasibility. Make sure it's original and not something already present on the site. Since I can't check the site, I'll have to make an educated assumption that this feature is not already implemented there. The user might be seeking something that's easy to integrate and provides immediate value.

Alternatively, using Web Push notifications if the site uses a service like Pushy. That allows the browser to send a notification when the video ends. It's a user-friendly feature that enhances the experience without requiring major changes.

The user wants a new feature to add to the site. Let's consider common features that might be useful for a media/content website. Users often appreciate personalization, accessibility, or convenience features. Maybe they want something that enhances user experience or provides more engagement.