parotia

The QVL is a list of devices the motherboard vendor has specifically tested, but not an exhaustive list of every piece of hardware out there.
I wouldn't worry about it at all. the board has PCIE 3.0 16x, the videocard does too. I have never thus far had a board + videocard combo not work (unless we're talking HP prebuilts who might lock it out.. Don't worry about that..)
 
In short; assuming all your other parts are compatible (mainly the case for the size and the PSU for connectors/quality/wattage) it will work!

Anything from MSI with MAX in the name is compatible with 3rd gen ryzen out of the box
 
The tomahawk Max has basically the same vrm as the mortar, so it's really the better pick here

So, tommorow ill be building my pc. ill be running ryzen 3600 on b450 max tomahawk with 5700xt sapphire nitro+. What are the must-dos after i install windows, i know about changing to xmp profile in bios. What else i should do to get things running as they should?

RAM can be compatible even if it isn't on the list.  I have G.skill Ripjaw V's in my system and they weren't on my MB's list and while the XMP profile didn't work, I had no issues manual adjusting the timings to work correctly.  All the list indicates is the RAM kits that the MB manufacture has actually tested and know hat work.

it will work. you'll maybe have to tinker a bit with the xmp profile, but it will work

These are B die - Lesser B die sticks, they are just that. https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232530?Item=N82E16820232530
 
Have three sets total of these with two sets in this machine right now (2700x - X470 Tachi Ultimate) and no problems.
They are kinda limited in clockspeed since the are lesser B die but with a 2 series Ryzen that's expected anyway.

I think your referring to Samsung B-Die when you say B-Die.  Off hand I don't know if the G.Skill Flare X is Samsung B-Die or not but I am not sure I would classify Samsung B-Die as a "Feature".  Generally speaking most people seem to feel it is the best quality of chip than can be added to a RAM module but that doesn't mean other types or manufactures like Micron or Hynix are necessarily bad chips.  Generally speaking no matter what manufacturer of RAM, if it is rated to run at a specific speed, latency and timings, it should be able to operate at those ratings.  My Ripjaws are Hynix chips but reach their rated 3600 mhz CL 16 specs just fine.
 
I think the reason Samsung B-Die gets so much recognition is due to its better ability to generally overclock beyond its rated specs. Other types can often do this too, but the Samsung B-Die stuff tends to more consistently offer OC potential beyond the rating and/or have more headroom available for overclocking. It is definitely the best choice for going beyond the ratings.  However, that doesn't mean Micron or Hynix can't often match what you can get from the Samsung B-Die, just that you have a lower chance of it happening.

I don't think the prices would drop by much. The 570/580 are already close to 100$ depending on the market and go for 70-80$ on the used market. I think this would be the best investment if you're on a tight budget. If you have 200$ to spare, go for a 1660 or try to find a used 1070ti or vega 56.

You said it will be "Very light video editing of 1080p" so I don't think you will have to work with hour long 4k footage that weighs 1TB. Its still an SSD with respectable read/write speeds. And if you go with more expensive M.2, you won't have money left for a good GPU.
 
Yes, Tomahawk MAX will do the trick.
 
1660Ti is much better value. If you can squeeze your budget to get the Ti, definitely go for it.  But 1660 is still a good option.  
 
As for brands. Everyone got their favorite. But I would advise against getting some cheap chinese brands.

Get Kingston A400 480GB SSD instead of your current one.
 
Does that motherboard come with Ryzen 3000 ready bios? If not, get MSI B450 Tomahawk because you will have to update it yourself, and you cannot do it without older Ryzen CPU on the Asus board.
 
Oh and get lower wattage PSU. You don't need more than 550W.
 
As for the GPU, you should have enough money for GTX 1660 which will suit your needs perfectly.