YOU SAID:
My best friend likes to eat apples while watching videos of cats
INTO JAPANESE
私の親友は猫のビデオを見ながらりんごを食べるのが好きです
BACK INTO ENGLISH
My best friend likes to eat apples while watching cat videos.
INTO JAPANESE
私の親友は、猫のビデオを見ながらりんごを食べるのが好きです。
BACK INTO ENGLISH
My best friend likes to eat apples while watching cat videos.
Well done, yes, well done!