Cooking is about technique and learning to use your senses, not following written instructions. That's why seeing a video of someone cook is helpful, because they can show you what to look for in a given recipe. Best is being next to someone cooking, who may not even tell you exact measurements but will show you.
For example
slate.com
For example

Why Do Recipe Writers Lie About How Long It Takes To Caramelize Onions?
Browning onions is a matter of patience. My own patience ran out earlier this year while leafing through the New York Times food section. There, in the...