The statement in the video "dyslexics rotate the letters" is largely untrue. For some really cool details on reading research, see Reading in the Brain: The New Science of How We Read
by a neuroscientist who has studied these issues for years and who is familiar with the difference that different scripts make in reading difficulties.
http://www.amazon.com/Reading-Brain-New-Science-Read/dp/B004...
by a neuroscientist who has studied these issues for years and who is familiar with the difference that different scripts make in reading difficulties.