Source Code - https://samelh.com/blog/2017/10/12/bulk-download-wistia-account-videos/

download_videos.py

import json
import urllib
downloader = urllib.URLopener()
 
# start by getting the full list of videos
with open('items.json') as json_data:    
    items = json.load(json_data)
 
# where to save the videos (directory)
save_to_dir = './'
 
def batch(startAt, stopAt):
    index=0
 
    for item in items:
        index+=1
        if index < startAt or index > stopAt: continue
        print( '[%d] Downloading %s..' % (index, item['name']) )
        downloader.retrieve(item['url'], '%s%s.mp4' % (
            save_to_dir, item['name']
        ))
 
# download videos from 1 to 999
batch(1, 999)

get_video_urls.py

import urllib2
import json
 
api_token = '<REST-TOKEN>'
 
def fetch_videos(page):
    try:
        return urllib2.urlopen('https://api.wistia.com/v1/medias.json?per_page=100&page=%d&api_password=%s' % (
            page, api_token
        )).read()
    except:
        pass
 
items = []
 
for i in xrange(1, 99):
    print( "Fetching videos at page %d.." % i )
    res = fetch_videos(i)
 
    if not res or not len( str(res) ):
        print( "Pagination has stopped at %d." % i )
        break;
 
    data = json.loads(res)
 
    for item in data:
        items.append({
            'name': item['name'],
            'url' : item['assets'][0]['url']
        })
 
print( 'Successfully fetched %d items.' % len(items) )
print( 'Saving to items.json file..' )
 
with open('items.json', 'w') as outfile:
    json.dump(items, outfile)