How to inflate the Huub tow float

I recently purchased a Huub safety tow float so that I could swim in lakes with slightly less fear of drowning. All very well and you would think it would be obvious how to inflate it. But it wasn’t and took us a bit of time to figure out. To save anyone else the hassle of how to do it, here is a video on it:
TL;TR is the valve can be stuck at first, so use the crap to press it up and down a few times. Then make sure you’re blowing as hard as you can as you need to press the valve down with the pressure of the air before it will begin inflating.
I recently purchased a Huub safety tow float so that I could swim in lakes with slightly less fear of drowning. All very well and you would think it would be obvious how to inflate it. But it wasn’t and took us a bit of time to figure out. To save anyone else the hassle of how to do it, here is a video on it:
TL;TR is the valve can be stuck at first, so use the crap to press it up and down a few times. Then make sure you’re blowing as hard as you can as you need to press the valve down with the pressure of the air before it will begin inflating.