:)

That hose in the video above is not a microbore hose, this is just a simple and average HPA fill hose, this what you get when buying an airtank or anything HPA related from aliexpress. These cost usually $ 4-5 and maybe $12 with brass fittings

A microbore hose have an internal dia about 1 mm the entire length, no way you can fill with that any fast. These cost 4x 5x more than in a video.

Next, there is a relation between a pressure and volume.

Second, have you seen those white puck "washers you need to place in between a fitting and a hose? Usually comes with a metric hose+fittings but if you buy separately you can have options for ID hole size. That is usually an flow restricter that was pissing me million times filling too slow.