import hashlib
sha = hashlib.sha256()

f = open('vid1', 'rb')

chunklist = []
hashlist = []

tmp = f.read(1024)

while tmp:
    chunklist.append(tmp)
    tmp = f.read(1024)


lasthash = hashlib.sha256(chunklist[-1]).digest()
hashlist.append(lasthash)
#hashbin = bin(int(lasthash, 16))

#print(list1[-1] + lasthash)

ctr = 0
for i in reversed(range(0, len(chunklist) - 1)):
    currChunk = chunklist[i]
    currHashMaterial = currChunk + hashlist[ctr]
    currHash = hashlib.sha256(currHashMaterial).digest()
    hashlist.append(currHash)
    ctr += 1

print(hashlist[-1].hex())