I haven't seen the video, but if he uses some sort of yeast nutrient and a decent volume, there's absolutely no problem with pre warming at all.
Talking about autolysis in this amount of time is tosh when the yeast cell cycle is roughly 1 hr 20 mins.
The manufacturer recommended guidelines are purely lowest common denominator for the average brewer - many of whom can't control temperature and are more likely to cook the yeast in the process.. hence, toss in the cooled wort.
The end result will be the same though for preculture vs direct pitch, you'll likely end up with the same number of yeast cells when fermentation peters out.
I'm a lazy arse who works with yeast sachets, and I sprinkle that in rather than pre culture (and I have a 50cm X 25cm Ratek controlled temp heat tray modified with stirrers. http://www.ratek.com.au/products/WT1-Medium-Analogue-Warming-Tray.html
having that at my disposal and not using it.... The height of laziness.