Solution:

The pic is from 70's Era and modern cell phone was not around at that time.

Solution:

The boy in the center. He doesn't have any shadow.

Solution:

Bucket-3

Solution:

Its explained in the picture and video

Solution:

The third Man as there is no shadow of the man.

Solution:

All are at an equal distance from the ceiling.

Solution:

Red or Tan

Explanation:
The numbers of letters in each color get reduced by one on every row.
Scarlet = 7
Orange and Yellow = 6
Green, Brown, and black = 5
Gray and Blue = 4
So the next color should be of three words like Red or Tan.

Solution:

4th Image

Images 1st 2nd & 3rd are images of the right hand while the 4th image is of the left hand

Solution:

Pink gift box.

Solution:

The Order of stupidity in decreasing order(most stupid to least) is 4,1,2 and 3.

Explanation:
Cutting his own trunk so Guy-4 is most stupid.
Next is Guy-1 as he is gagging on a tree that is to be cut down by guy-2.
Next is Guy-2 as he is not considering him to go down.
Guy-3 is a bad person but not a stupid one.