What you're looking for is the intrinsinc value of a business, which would be, strictly from a money point of view, if you buy the stock right now, how much cash would you expect back in the future?
If you expect a company to run indefinitely, which we have no reason to expect Netflix won't given its current success, you can run a discounted cash flow (DCF) analysis, which estimates from the cash flowing into the business, via revenue less expenses, how much you can expect back over time. This is sometimes called free cash flow.
From past earnings report (SEC forms 10-K and 10-Q's, or Yahoo Finance or your favorite finance website) you can get a sense of the rate of growth, discounted to the present (usually the opportunity cost of not having invested in something else that you assume to give interest forever, like U.S. treasury bonds). Since everyone has different investment choices available to them, at different amounts ($1k, $1m, or $1b), you should set this for yourself.
You can find the basic formulas here, to determine the discounted sum of free cash flow over a certain period where you have financial data (years 1 through n), and then a lump sum to approximate what it will be in the future, indefinitely (in perpetuity, where you have no financial data).
You can use the free cash flows growth over years 1 to n to estimate the growth over time expected for the , but you can also add in a margin of safety if you want to budget in future events that would severely impact cash flow, such as natural disasters, cyberattacks, etc.
I don't factor in inflation of, e.g. the U.S. Dollar, since assuming this is a U.S. company, it would probably affect this company's stock or any other investment you compare it to (discount it relative to) the same way. However, this may not be correct, if your alternative is to hold it in a different currency with a different price behavior.
Once you have the total cash disgorged in perpetuity, divide by number of outstanding shares, and you have the intrinsic value at the present moment. Play around with the discount rates and growth rates in a spreadsheet to see how instrinct value varies, and you'll get a sense that intrinsic value is a range, rather than a specific value.
Warren Buffett says that he doesn't even use a spreadsheet and doesn't need a lot of precision. After he's valued so many companies, he can look at financial data table (e.g.a Valueline report) and tell in 30 seconds whether a company is undervalued enough, and what volume of investment it can support.