Not that I would wish to encourage any form of cocaine production, but I'm not sure cocaine extraction should come under synth discussion. Effectively, its the isolation of an active product, so, in principle, it should probably be treated like other extractions e.g. codeine, cannabinoids, mescaline, DXM etc.
As cocaine is rumoured to be grown in Australia (see past posts in this forum) there's likely to be various (local) ideas on how best to extract the alkaloid...
In looking at the video, the steps aren't that clear although the basic method would probably work. Both diesel and petrol would probably work as the N/P solvent. I should point out however, to produce a more pure product, the mentioned production of the HCl salt also requires another process to facilitate the removal of other alkaloids. Details can be found on Erowid