To access the downloaded videos, please go to ''Profile'', then click ''Offline''. All of your downloaded videos are stored there.
Note that the download functionality works for the app and the browser, we don't give the files to have them in video format other than playing it on the web app or mobile app. This is in order to protect intellectual property.
Note that you will always have access to the programs. Think about it like Netflix, you don't download a movie on your hard drive, but you download it to be accessed from your mobile device.