Second one is Chinese and too hard for me... He spent most of the time saying that he didn't understand alot about it.
1st one is saying that, yes, the (1.17 X) DK-21M does work on the EOS. It was only available in Akihabara (Yodobashi Camera and Sofmap). He says it works just OK, (because his nose isn't too long) but others may have a different opinion.