^ That's only if you get the engine too hot, then not for the reason stated in the video but rather that it softens the aluminum.
How the coefficient of expansion affects a hole in a piece of metal is universal, the hole will always expand. The head is clamped down, but don't you think that what it's bolted to, is hotter still and also expands? It has to be engineered to allow for that or else things break and/or fasteners loosen.
You can test this yourself, find a piece of cast aluminum (whatever), and put a hole in it just large enough to put a fastener through, then notice increased slop after heating it. If you heat the fastener to the same temp too, then it has to have a lower coefficient of expansion, like a spark plug's steel threads do vs aluminum.