This is an excellent and concise video on the subject. It's while since I've had to bore precision holes and ages since I was taught how to do so, so it was an excellent refresher course.

Its comments on measurement and metrology are particularly strong and well worth listening to.

On that point, I wouldn't use calipers to measure the ID of a precision hole but I'd almost forgotten that scaling error requires the ID jaws of calipers to be a thou or so smaller than the OD ones. Stands to reason when you think about it. Raising that issue shows how useful this video is, it shows that its authors pay careful attention to detail.

Similarly so, their comment in respect of plug gauges and the trouble in differentiating between them during hole measurements due to burrs etc. (I'm a bit obsessive about deburring workpieces properly and I get pissed off when I see others failing to do so - so this comment rang bells with me.)

I'd strongly recommend this video to just about everyone in the machining game.