UPDATE!
Download PDF here: https://8de0a213-8dc3-46fb-b3e6-9a1f5491bead.usrfiles.com/ugd/8de0a2_86056b7752104e58a91dc9b45dc34867.pdf
A new, and hopefully more informative video on how to do double, and TRIPLE tongue on the clarinet.
Easy peasy lemon squeezy.
Please leave questions in the comments if you have any! :)