Oh ok. It doesn’t look better? 
shiny is better but it looks like it’s globbing up and not soaking in properly
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Looks better! But still needs some work.
You want to focus on heating up the wire and connector a little more. a good rule of thumb for learning is the things you’re soldering should be hot enough that you can melt solder into the joint by touching it wire/connector (not the iron). You’ll notice the solder suddenly wanting to stick to the things you’re soldering.
Tip: a little blob of solder on the tip of the iron helps transfer heat.
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Definitely better mate!!!
Its easy to clean the flux off while everything is still hot, gets harder as it cools.
But, leaving it on there isn’t gonna hurt anything.
You’re on the right track, keep practicing! That wire doesn’t look awesome, it looks like the insulation is melting? Most of us use high strand count silicone wire, much nicer to work with and better suited for esk8
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Only the weird shit for display! Some dead old xt60s and 30s used for them bullets, 18s bms header and some buttons for my rectifier. Healthy amount of hot snot to keep it nice 
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What solder wire brand are you using?
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Kester
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That joint you posted above, if you had it all clamped up and plug the connector into another one to keep it straight - then take your hot iron to the solder blob on there until it wets out. Let me see if i cant make a little demo that shows it and then itll make sense i think…
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That’s a decent joint, but I think it could be better. I’d even call that joint a cold joint, just looking at this ridgeline here where the solder didn’t melt/merge with the wire…not sure I’d trust that the XT60 bullet plug or wire got hot enough.
@Dnollie Ideally you’d do everything in one heat cycle, helps the flux do it’s job (remove the oxide layer and let everything wick/stick together), as well as heat up everything to a temperature that the solder will stick/wick to.
That said, probably descending into reddit.com/r/soldering armchair nitpicking here. That joint would be/is perfectly functional, and I respect the effort of filming and posting a video to help @Dnollie 
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@Dnollie just to illustrate what tuckjohn is talking about, it’s this ridge here:
Having a sudden end and rise to the end of the solder line is usually a sign of not getting the wire quite hot enough. This is also why it’s important to add your heat quickly and pull it off as soon as it wicks into the wire.
As a personal preference i like to pre tin my wire shorter than is fashionable. I know ive got full surface contact with the wire but its not possible on most setups to dump heat in fast enough and so generally a short joint looks like (and is) a cold joint.
@tuckjohn thats #10 and an xt90 btw. It will descend into pedantry! My honor as a solderer is at stake here !!! What about flexibility! What about pre tinnnnnnnnnmnn! Seriously though good eye
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In the bin.
Seriously tho, the pedantry is good, there’s definitely some finesse to good soldering and pointing out little things like this is good for education sake!
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We need to have a game of J-O-I-N-T to determine who has the bestest skilllzzzzzz
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Yeeeeeessss! Gonna go grab my #8 and xt60s
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Goddammit i dont have any 8awg 
I’ll search through my scrap bin
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I just finished hand soldering these two PCBs
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That is legit beautiful 
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