The second video looks a lot better but atmosphere definitely plays a role, as previously stated.
The Smax juice has good vapor production but my POA bottle didn't 'put out' like the store sample did. Go figure. Ohms and volts are important but WATTAGE is the heat that is produced. It's a constant across different voltages and resistances.
As I'm sure you've read, higher VG content makes more clouds. I routinely add straight VG to juices to dilute flavor and increase cloud production. Spend some time with a coil calculator like steam engine before you rebuild. I look for higher heat flux and lower heat capacity (do the ohm's law to determine your wattage for a realistic heat flux). I've yet to find a 22ga setup that I like, even on a regulated mod. The more you play with the numbers you'll see a relationship between heat flux and heat capacity that leads you away from 22ga and toward 26ga. Heat flux is the "hotness of the vape" and heat capacity is the ramp up/down time (slower ramp
down gunks coils and turns wick brown). Those are my words from experience, not science.
The biggest clouds I've blown on a single battery mech were with 24ga parallels @ 0.125-0.14 ohms (depending on the ohmmeter) but I didn't feel good about the amperage draw. AT ALL. It's approaching the pulse limit and, in my book, THAT AIN'T COOL. It did, however, make people go WhattheF?!?! When I was out and about. Even people that were holding drippers. Once upon a time at a B+M with that build... I totally stole a dude's thunder that just rebuilt a 30mm dripper on a Congestus w my MX1 on a 18650 stingray. Anyways...
For a single battery mech - To date 26ga parallels @ 0.16 ohm (on the lowest reading meter I have) was the standard by which I've failed to replicate with a different gauge or build. Am currently vaping on a 25ga parallel build @ 0.15 that is not as good in any regard (lower heat flux and higher heat capacity). The 26ga parallel build ramped up fast, blew big clouds and wasn't scary (to me) as far as batteries are concerned. I also use Mutation Xs (v1 and v2) on Efest 35A/20A batteries. 1/8" is my "standard" diameter. Again, play with a calculator to see what gives you better heat flux and capacity numbers.
IMHO to blow stupid clouds you need more than one battery. I prefer 2*18650 in series @ 8V. Here's the only cloud pic I have. DIY dual series mech box, VTC4s, mutationXv2 with 26ga duals @ 0.44.
19A. 150ish WATTS (on a mech box). The low amperage is just ohm's law. 2*V and 4*Ω = the same wattage as a single battery build but with half the amps.
I wish I had kept that build in tact. It was before I learned anything about inhale/exhale techniques. It just chucked the Fn clouds no matter what I did. It was angry and thirsty. 6 drops of juice per hit or so.
Sorry for the preachy/rambly post. I hope any of this helps you get "there". Blow those clouds YouJeen!!!!