Kittens need their mum the most in early weeks of their life. It is suggested not to take any kitten away from its mum until it is few months old else it is difficult for kitties to survive.
Usually mom cat feeds its little one for couple of weeks after their birth. However, in some unfortunately circumstances when it seems impossible then kitten can be fed with the help of dropper just like in this clip.
This video clip is about a gorgeous little kitty who might be just few weeks old. Kitten got gorgeous eyes and she is playful and active.