Almost anything can be easily revealed about any internet user. Why not use it to give authors a powerful way to contextualise what people read? People will get a bonus for giving away privacy: saving time.

For instance, instead of writing

If you have an iPhone, go to Settings ‹...›
If you’re on Android, then there is no way to solve this.

write

Since you have an iPhone, go to Settings ‹...›

The same idea can be applied to videos too.