Funnily enough I just watched that video. It's very good - although I wouldn't fancy using a wardrobe as it loks like a long drop. She obviously knows her hamster, but Charlie would just leap and get hurt lol. I find putting a blanket backdrop on a double bed or sofa is fine. She has some very professional looking lighting there, but you could do similar with a tall anglepoise type lamp and a tungsten bulb. I think daylight is easiest. I like her tip about keeping it to 2 or 3 minutes so as not to stress the hamster.
Here it is
https://www.youtube.com/watch?v=16so8o4erVY