Check online prices here:
Amazon:
3/4" wide thread tape: https://amzn.to/32hUwqL
Blue Monster as shown in the video: https://amzn.to/34ifjwC
Home Depot:
1/2" under a dollar: https://homedepot.sjv.io/ZO3vX

When Should You Use and When To NOT Use Teflon Tape On Your Plumbing Water Connections

John shares many common plumbing connections and talks about the times you need thread tape or Teflon tape for your water line connections.

http://www.weekendhandyman.com