Everybody has one - and what a great excuse for celebration
In the resources database everyone's birthday is listed.
There can be a (series of) page(s) dedicated to celebrating your birthday.
Imagine getting a birthday card signed by a hundred (or more) people.
So, still pics: these are much easier to present online and many more people have access to a still camera than a video.

So, you - or someone in your family - or one of your friends - has had a birthday.
Lets have the video.... of friend 'x' falling into the swimming pool!
A picture or two at least. The cake cutting.
Everybody at the party singing happy birthday. TO YOU.

What else can you think of here ...?