WRONG! WRONG! PLEASE CORRECT VIDEO ASAP!
You do NOT use white teflon tape for propane! You use YELLOW tape which is made for gas. WHITE teflon is made for water. Yellow teflon tape is available from Amazon or Home Depot....... or any hardware store (probably). Yellow teflon tape is sometimes called GAS TAPE!
http://allthumbsdiy.com/plumbing/when-to-use-ptfe-teflon-yellow-or-white-tapes-or-pipe-dope