I think that I am a enough good chess player to teach chess. So, I want to create a website and post chess videos in it. So I want a software that helps me teach chess like for example see this video: https://www.youtube.com/watch?v=VDfjsMXlcek This video was given by thechesswebsite.com. Note the software that he uses, I asked him about it but he is not replying so I want your help. Thanks in advance.