my front page

Hi,

i have a website powered by wordpress : https://www.wasteman.com.au.

If you look at the site you will see an image sitting under the slider. I don’t know how it got there and i certainly don’t know how to delete it?? and if i can be so bold as to ask one more question: can i resize the youtube image on my front page let’s say to something about half the size?
I would really appreciate some help
wasteman