How much energy does it use to convert the plastic? Are you using more than you create? It's no good if it takes 1.5l of oil to create 1l for example. It's hardly worth it if it takes more than about 50% of the yield.
I've had a bit to with this. It is simply pyrolysis at work.
I don't have the stats on me but it's super efficient. It's also not new - been kicking around for ages.
The main issue with commercialising this is the cost to get the waste plastic in bulk from its source to the operation, vs the value of the output of oil and the setup costs. Ie it needs a LOT of plastic to make a commercial quantity volume of oil.
That oil can also be blended to make diesel on site, or used for other purposes.
Trials have been run in QLD for some time, and a company I know well is in the process of building a commercial plant.
The Japanese dude in the video is a legend - he made these for the poorest of the poor so they could make their own cooking and heating fuels from plastic often scavenged from dumps.