That is really cool! I haven't tried hot plates because I didn't really have faith that solder would actually pull the component down and align it. I think this video might have improved that faith :-)
* The hot plate I used was the "Presto 07211 Liddle Griddle", which worked well. https://www.amazon.com/gp/aw/d/B00006IUWL
Though I’ve had many a SOICs magically realign on the hot plate — they were pretty forgiving — it’s not worth it to run without proper temperature profiling, even if it’s from a hacked toaster oven :)