Thanks for the links and the video, OC!
I can say that they are definitely not Britains. Britains makes figures in 54mm and has never made anything remotely close to wargaming sizes.
There are many manufacturers of wargaming-scale figures, and your may come from any of them. I'm more familiar with the manufacturers of plastic small-scale figures, like Airfix, Hat, Zvezda, so that's about as far as I can take you.
I will offer a suggestion to try the toy soldier and figure forums, too. One is Treefrog Treasure's Toy Soldier forum: http://www.treefrogtreasures.com/forum. I'm a member over there, and there is a great wealth of knowledge, including some guys who know more about the smaller figures. Also, try PlanetFigure, www.planetfigure.com/forums. That's more of a painter's and connoisseur collector's forum, but there, too, are many who work with smaller scale figures, so you may be able to find more info about the figures you've bought.
Hope that helps, best regards,
Brad