The key here is seeing the little 'P', 'B', '1', and '4' under some of the moons. The "14" especially gives away that you are supposed to transpose the message on the card onto the moons starting with the top left. (The 'B' in "celebration" ends up being off by one space but they've made little mistakes like that before.) To find the 5 letter word, take the letter from each full moon and spell out:

Pretty obvious imo, take the word said during each of the flashes in the video and add them to the grid design in the bottom right, starting from the middle and working counter clockwise. The word is then in the vertical shaded section.

The key here is in the little dots found on the cards first and second pages. Choose a color and start with the single dot, then connect that to the cluster of two dots of the same color, then the cluster of three, etc. until there aren't any more of the same color to connect. Each drawn figure is a letter (for instance, the black dots form an 'E'). To figure out the correct order of the letters to form the word, arrange the letters in the order that the colors appear in the poem.

This ones a pigeon cipher, looking at the 4 pictures shows a set of letters on the pumpkin. These can be listed out in order as 'LENTGAHI'. We can fill this out in the pigeon key already provided, starting with N in the top left and moving through the list clockwise. Then we use the code to find the answer.