I think it would work fine, heating in a different kettle and using this to direct your pour. The transfer of the liquids would be your "45 seconds off boil" delay. Perfect.
I like the Hario kettle in that it holds 40 ounces. That gives me plenty of margin to wash the filter, warm the Beehouse cone and porcelain pitcher. Rests for 30 seconds and then I am ready to do the pourover with a preheated setup. You could do all that with this oil can if you had your larger kettle in the background.
B|Java