When Primuses and Tilleys were ubiquitous, of course, so were village shops where you could buy paraffin and meths. Whilst a hiker wouldn't carry a Tilley (too bulky), I certainly carried a Primus (or rather a Spanish look-alike) as a Venture Scout. That was when Trangias were beginning to take over.
Trangias are quicker to light and somewhat cleaner, and only need one fuel to be carried. They also incorporate the pots. However, a Primus is hotter.
Back to lamps, and Tilleys do, as the video says, produce a decent amount of light (if the glass is clean and so on).