Yes, considering the display size and battery capacity, Honor 8 is quite light weight. It weighs just about 153 grams.
Basis on my extensive use of Honor 8 for about 4 months, I can say that these are the biggest advantages of Honor 8.
01) Super Aesthetics
02) Superb Camera Quality
03) Good Internal Software
No. You cannot record 4k videos but you can play 4k videos on Honor 8.