Interesting short video but in my humble opinion 2 important safety considerations failed to get a mention:--
(a) one should always ensure that where connections/adapters have an 'O' ring that these are in good condition and are in place.
(b) after making any connection always check for gas leakage by doing a soapy water test. To do this mix a bit of washing-up liquid in a cup, add a bit of water and stir to make frothy. With a small brush apply the soapy mixture around all points of connection and check that no bubbles are being blown as a result of gas leaking past the joint. This is especially important when, as shown in the first part of the video, a pipe is being connected to the regulator. As a matter of safety, one should always check that any new connections made are gas tight.