Finding the right tank is a good thing. Whatever setup you have, make sure you have enough coils to keep you in business. It also helps to have a backup while you wait. when I was into clearomizers, I would have at least 2-3 coils in the "vape box". I still use CE5's occasionally, and still keep a supply of extra coils.
As far as the vapor production, that is a fine balance of settings, coils, and juice. There is no one answer as to why you're not producing the same vapor. Just keep in mind, on Youtube, people tailor their settings to have a stronger visual appeal. That does not mean their vapor tastes better, or is more satisfying.
For kicks and giggles, I ordered something I don't normally do, I ordered 20pg/80VG juice. I got tonnes of vapor. I had to offset the loss of PG by requesting more flavor added. The end result was more vapor, same flavor, almost no throat hit for that flavor. Going back to my regular preference of 60Pg/40vg, no extra flavors I get less vapor, same taste, but a satisfying amount of throat hit.
Finding your personal preference is something you just have to experiment with. If there's something you like about a particular juice, or find you start liking a particular setting on your Evic, then feel free to ask. There's a lot of us that's been through the same process, and have our personal insights that will help you guide you to a good setup that works for you. Hopefully, you won't have to spend a lot of money on stuff to get to your target goal of a good vape.
And don't take video vapor production into consideration, those are called "cloud chasers".
Sort of like putting cards on a bicycle spokes to make a noise... doesn't make your bike any better but to others it may seem like a cool thing to do. However, I've never seen any playing cards on the tour de france.
