I would be afraid that the head would not come out using this method.
The last tick bite I had I feel the head was left in and the bite got infected causing me a lot of problems.
The method we have always used is to use alcohol to get the tick to back its head out or use tweezers very close to the skin.
What happened with my last one is when I found it I just jerked it out leaving the head in.
I have not yet had the opportunity to personally put this method to the test.
I know the head of the tick remaining in our skin is a common issue. The bevelled V-shapped part of this tool appears to be the key to removing the tick entirely (see the Youtuber's larger sized demo later in his same video).
We sell little credit card tick remover tools just like this in our shop and I can say they do work. The trick is to be firm and swipe the tick off with the card next to the skin. There is a slight tug as the tick comes off.
I would not use alcohol or tweezers to remove ticks as I understand that anything that stresses the tick is likely to cause it regurgitate and therefore be more likely to infect you. Personally I like the little hook shaped twisty tools - they're much easier in furry areas. However, in an emergency this method shown would be a good get you out of trouble method of making a )free) removal tool. Thanks for sharing!