Deleting a video is super easy, and there are a few ways to do so.
Delete videos from your Dashboard
Just click on the three dots and then onto 'Delete'
Delete videos from the video's Edit page
Click onto the video you want to delete, then top right click on the three dots and the onto 'Delete'
Delete your Requested videos
Head over to your Video Request tab then you'll want to click on the three dots in the top right hand corner of the thumbnail, then onto 'Delete Video'