import requests
import os
import time
from requests_toolbelt import MultipartEncoder
file_ = {'video_file': (mp4, open(full_dir, 'rb'))}
r = requests.get('ЗАПРОС'}).json()

upload_url = r['ПАРАМЕТР']['ПАРАМЕТР']
payload = MultipartEncoder(file_)
rs = requests.post(upload_url, data=payload, headers={'Content-Type': payload.content_type})