For clarification, based on your video it looks like you are using a rigid hose, not the soft hose linked in your question. The soft hoses don't hold their shape as much. They can stretch around other elements like the pneumatic hoses do. They aren't common. One use is for the SCUBA mask (32037) in the 1997 Technic Search Sub:
It appears that you are using something like Hose, Rigid 3mm D. 8L. These parts should be able to do what you want them to do. I've tested with a number of mine from different eras, and they all had a strong enough connection that the 1x1 plate didn't fall off.
This part is made of a softer plastic than the regular ABS, so it is more susceptible to wear than elements like the 4L bar. I did find that some of my parts had a weaker connection than others. It is possible that your part is a little worn down, or that a slightly smaller non-LEGO hose snuck into your collection. I believe I've had that happen to me in the past, as there's no LEGO logo on these parts.
I would recommend trying with another hose. If you are using the soft hose, try using one of the rigid hoses. It's possible that the 1x1 plate is the problem, but that can be easily tested by confirming that a bar connects firmly.