The YouTube channel has over 500k subscribers but most videos have well under 50k views, complete with click-baity thumbnails. Those numbers mean nobody actually cares. Internet personalities like these make their money by selling newsletters and "classes," which supplement the ad revenue from their YouTube channel. If she were actually a miraculous investor, she wouldn't be running a mediocre YouTube channel, and she surely wouldn't be giving away her secret sauce for a nominal fee.
Day trading is one of the fastest ways to lose money. In fact, the vast majority of actively managed funds underperform the market. And those are run by "professionals" who do it as their full time job. Mere retail traders are differentiated from the denizens of Reddit's Wall Street Bets only by their lack of self awareness.
Rather than asking experienced traders if you're missing anything, you should ask successful traders if you're missing anything. The former may have spent plenty of time trading, but statistically are all but guaranteed to be much less wealthy than the latter, who instead buy broad market index funds (ETFs or mutual funds) at regular intervals regardless of market dynamics.
A number of studies found that women are more successful than men when it comes to stock trading. Do women know something men don't? Probably, but the data show their success is largely because because they trade less frequently.
I'd recommend reading Efficiently Inefficient, which is a serious book on how hedge funds work. It's about how "smart money" invests. It will give you a sense of just how pitifully unqualified retail traders are. Not really because most don't have PhDs in math, but because they don't have access to massive data sets, citadels of computing power, and a thundering herd of engineers keeping everything running.
For a lighter read, you can check out Flash Boys, which explains how high frequency traders manage to use ultra fast communication networks to execute your orders before you can. Likewise, Daniel Kahneman found that the performance of "top" investment managers at big name firms was wholly indistinguishable from chance. He didn't make himself popular when he explained that to said managers.
If you want to get a real education on finance on YouTube, I'd recommend starting with Robert Shiller's Yale course on Financial Markets.