Animation How to video for Web service

We are looking for a expert who can make animation video. We want to explain about our new web-service by showing the video on the web. The video must be similar and like to below: [login to view URL] Our animated video need following: -90 to 120 seconds length -voice narration/voice over ( perfect English Accent)/ -royalty-free music, images, etc... Very good animator/drawer is required. You have to provide (voice over,animation,sounds, music) you have to make and deliver all of that. Please show us your examples when you bid. Storyboard will be send to choosen bidders only. We will provide images of the system.