Wildlife/Conservation Youtube Channel?

Hello
I am a Wildlife Science student at University and have recently started my own Youtube channel. You can see it here: www.youtube.com/keepearthwild

My question is, I need some video ideas. I am young and want to target the youth of the world with my message so the videos need to be interesting but still serious!

I have had a number of media opportunities offered to me such as radio and magazines and things are going great for me but the Youtube channel is the next thing I want to expand so I can reach the whole world.

I have thought about these videos:
*Things you never knew you could recycle
*A tag of some sort? (if an appropriate one exists?)
*Interviews with a selection of people to determine how much the general public knows about wildlife and conservation

Any other video ideas would be greatly appreciated!

Thanks in advance