Our friends built this same style chicken tractor and they enjoyed it as well. They didn't include the wheels but it was pretty easy to slide along in their yard.

I agree with you regarding YouTube (I chose not to upload my videos there either) but I read about ongoing difficulties with Dtube and decided I have enough learning curves on my plate. I went with Vimeo and... so far so good. Just thought I'd offer a different possibility if you can't get Dtube going.