I haven't seen many instructionals that would be really good for white belts. Saulo's instructionals are good, but are not especially geared towards white belts in my opinion.
I think you should look for an instructional that shows you one or two techniques for each position, and explains them in detail. 99% of instructionals will have a section on half guard, and then show 5 or 6 different passes, which is not really that useful.
Probably one of the best series of instructionals I've seen for beginners are TrumpetDan's videos on youtube. He gives you a couple of options for each position, explains them very well, plus they all fit together in a system. And it's free!