I watched how he did it and it looks pretty good.
My only critique is that he is pulling the sensor through while the seal is still "squashed." This most likely will shear off the hard rubber of the seal as the sensor head is pulled through the hole. (and may damage the tank hole).
By leaving the nut on, and tapping the sensor towards the tank the sensor head is no longer squashing the seal and IT can be pulled through (with needle nose pliers or dykes) without the sensor head competing for space in the hole and then once the seal is clear the sensor head will come right out with no fuss.
His way seems more "forceful" but it worked for him.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW