I don't know what he meant by legit, but some white noise videos on youtube feature jumpscares after a while. These are specially bad on people with cardiovascular issues and/or elderly. Always be careful before any kind of meditation-like video.

By legit I mean that they don't pass off white noise or some other noise as pink noise. Try and see what works for you. There is also the YouTube Music app you probably know of that you can use to play something overnight.