I was watching a film online recently, on my own. I wanted to share the experience with someone, a friend, but was too lazy to delay the experience by inviting a friend around, so proceeded to watch the film anyway.
I have in the past watched things on live TV, and spent the whole time discussing the programme via text message, or phone calls during ad breaks.
What if you would watch your chosen programme with a friend without being in the same room, but have a shared, connected experience, as if you were?
Start the programme/movie at the same time, and have real time interactions. For example, an in screen video of the person you are watching with.