Was that really necessary? You were watching a video. You saw a system to automate lava transport from the nether. You want to know how to build it. That's all we need. Your little snide remark about tekkit serves no purpose other than to add vitriol and fuel a fight.
That it was tekkit provided context as to what mods were involved in a quick clear and concise manner and assisted those who wished to help the user in knowing what mods exactly were involved, and which weren't.
Reading the thread please note yours is the first with snide remarks and vitriol.
I guess Forge changes it to keep the dimensions loaded... well at least my Quarry and my Netherpump work somehow even if I'm not in that age/the nether.
Quarries now have (have for a little while at least) a built in chunkloader. I think it only loads chunks if the quarry is being powered and is mining, not sure though haven't tested.
To OP, I would suggest investing in a netherack, magmatic engine, and Magma Crucible system. You need a bucket of lava to start but after that the only limit to how much lava you can produce is how many Magma Crucibles you make (and how many magmatic engines per crucible, max of 5/per), and the setup is simple, quarry in the nether pumping netherrack into a (or a few) enderchests (and some overflow chests), then pumping out the netherack into an army of waiting Magma Crucibles, which are powered by magmatic engines (pump lava from the crucibles to the engines), and the excess (and there is a lot of excess lava) can get stored in a waiting railcraft iron tank (or boring old buildcraft tanks, yawn, lol).
If you are playing SSP, then this really cuts down on lag because there are no flowing liquid calculations to worry about in the nether.
The largest size railcraft iron tank is 7x7x8 (unless they made it 9x9, don't know), that stores 6272 buckets of lava, I filled up the largest size railcraft iron tank with lava in a few hours, I'm going to power my whole base with lava, muhahahahah!