If a company were to be #1 on Google, they would have to be in a domain of popularity. To do this, you could follow in the video but it comes down to the domain you use.
To stay in the top, it’s very hard and not likely possible to stay there. Factors of what would push a company off the #1 spot consist of what is popular of the day, the different pages of the companies website, keywords etc. It’s difficult to stay on top of the Google page, but it’s not impossible to get #1.