I'm watching a nature video
What made you want to watch a nature video?
I had nothing better to do
Its a good idea to watch a nature video especially if you enjoy it. There are so many neat things to learn about nature, and a video like this sounds like a great tool to utilize for this reason.
I need to study the birds and the bees.
You have the right idea then, lots of nature videos have birds in them and sometimes bees. You have a whole slew of animals to see on those videos. It will be very educational, and even memorable for you to relax to.