Merrylock 4 Thread740DSA : Aka Rubina 740DSA

I found this video by chance when I was looking for more information on the Merrylock 740DS 4 Thread Overlocker. This video's is in Russian I think, (forgive me if I have this wrong). I found the this video really good to follow, even though it is not in English my native language.

It seems that the Merrylock 740DSA goes under another brand name of 'Rubina 740DSA Overlocker'. Who would have thought? Now I know...