What am I?

They put pictures on me
then take pictures of me
to share with the world

But the pictures disappear
as my end draws near
and anxious heartbeats stilled

I am sought after very wide
especially after every night
when things are put in motion

And after a little while
I will be able to defile
your ability to sleep with devotion

This riddle has been validated through Sandbox submission: here

They put pictures on me
then take pictures of me
to share with the world

But the pictures disappear
as my end draws near
and anxious heartbeats stilled

I am sought after very wide
especially after every night
when things are put in motion

And after a little while
I will be able to defile
your ability to sleep with devotion

What am I?

This riddle has been validated through Sandbox submission.