import requests
from bs4 import BeautifulSoup
import ffmpeg

s = requests.session()

r = s.post('https://video.technion.ac.il/'+vid_attr[0].get('href'), verify=False)
video_attr = BeautifulSoup(r.text,'html.parser')
vid=video_attr.find_all('a',{'class':'closebox'})

stream = ffmpeg.input(vid[0].get('href'))
stream = ffmpeg.hflip(stream)
#stream = ffmpeg.output(stream, 'output.mp4')
ffmpeg.run(stream)