You were looking at the wrong piece of code. Twitter features lightly obfuscated javscript. Bring it to order and you'll receive something like this:
{ "duration": 55322, "scribe_widget_origin": true, "heartbeatEnabled": false, "video_url": "https:\/\/video.twimg.com\/ext_tw_video\/823648834102272000\/pu\/pl\/BZiFV49f1BCX2JkK.m3u8", "disable_embed": "0", "videoInfo": { "title": null, "description": null, "publisher": { "screen_name": "VinePhilly", "name": "Global", "profile_image_url": "https:\/\/pbs.twimg.com\/profile_images\/822579605177532418\/ZS3emkF8_normal.jpg" } }, "cardUrl": "https:\/\/t.co\/dpfYidciVZ", "content_type": "application\/x-mpegURL", "owner_id": "2495729384", "looping_enabled": true, "show_cookie_override_en": true, "visit_cta_url": null, "scribe_playlist_url": "https:\/\/twitter.com\/VinePhilly\/status\/823649890379120640\/video\/1", "source_type": "consumer", "image_src": "https:\/\/pbs.twimg.com\/ext_tw_video_thumb\/823648834102272000\/pu\/img\/XgQjj1Y0_Sclf2SY.jpg", "heartbeatIntervalInMs": 5000.0, "use_tfw_live_heartbeat_event_category": true, "video_loading_timeout": 45000.0, "status": { "created_at": "Mon Jan 23 21:53:31 +0000 2017", "id": 823649890379120640, "id_str": "823649890379120640", "text": "Bro They Had A Picnic In Walmart \ud83d\ude2d https:\/\/t.co\/dpfYidciVZ", "truncated": false, "entities": { "hashtags": [], "symbols": [], "user_mentions": [], "urls": [], "media": [{ "id": 823648834102272000, "id_str": "823648834102272000", "indices": [35, 58], "media_url": "http:\/\/pbs.twimg.com\/ext_tw_video_thumb\/823648834102272000\/pu\/img\/XgQjj1Y0_Sclf2SY.jpg", "media_url_https": "https:\/\/pbs.twimg.com\/ext_tw_video_thumb\/823648834102272000\/pu\/img\/XgQjj1Y0_Sclf2SY.jpg", "url": "https:\/\/t.co\/dpfYidciVZ", "display_url": "pic.twitter.com\/dpfYidciVZ", "expanded_url": "https:\/\/twitter.com\/VinePhilly\/status\/823649890379120640\/video\/1", "type": "photo", "sizes": { "small": { "w": 340, "h": 425, "resize": "fit" }, "large": { "w": 480, "h": 600, "resize": "fit" }, "thumb": { "w": 150, "h": 150, "resize": "crop" }, "medium": { "w": 480, "h": 600, "resize": "fit" } } }] }, "source": "\u003ca href=\"http:\/\/twitter.com\/download\/iphone\" rel=\"nofollow\"\u003eTwitter for iPhone\u003c\/a\u003e", "in_reply_to_status_id": null, "in_reply_to_status_id_str": null, "in_reply_to_user_id": null, "in_reply_to_user_id_str": null, "in_reply_to_screen_name": null, "geo": null, "coordinates": null, "place": null, "contributors": null, "retweet_count": 0, "favorite_count": 0, "favorited": false, "retweeted": false, "possibly_sensitive": false, "lang": "en" }, "show_cookie_override_all": true, "video_session_enabled": false, "media_id": "823648834102272000", "view_counts": null, "statusTimestamp": { "local": "1:53 PM - 23 Jan 2017" }, "media_type": 1, "user": { "screen_name": "VinePhilly", "name": "Global", "profile_image_url": "https:\/\/pbs.twimg.com\/profile_images\/822579605177532418\/ZS3emkF8_bigger.jpg" }, "watch_now_cta_url": null, "tweet_id": "823649890379120640" }
You should be able to get to the video url from here. One more tip: the 'video_url' points to a playlist file. I'm not going to do this due to legal obligations.
I hope this helps