I don't wish to offend anyone so I am not going to give specifics. We have purchased some dvd's and books, both from popular names in permaculture and we were quite disappointed. What we thought would teach us something just showed us tours of gardens, we could have toured a garden down the road, for free! Then there are the hours spent reading things that you could have read for free right here on permies in a simple discussion. There is great information out there, plenty of it worth the price on its cover. I just advise really making sure a dvd or book is going to suit what you want it to before purchasing, because there truly is a ton of this information readily available at no charge. That being said, sometimes the free stuff is hard to sift through, and that can also be very frustrating.
Permies is great, this community is largely people who want to help other people, so that's nice.
Peak Moment TV is an alltime favorite of mine that I always come back to, I don't watch every episode but they have covered some amazing people and they will connect you with those people so you can ask questions or learn more about how they are doing what they are doing. Janaia is also easy to watch, she is so mellow and sweet.
I have also found some very useful information by just googling "permaculture" or "sustainable" and use the search tools to look at videos or blogs posted within the last month, week etc. This method can get annoying though, today there are so many people pumping out videos about this topic. A lot more than there were a year ago when I started doing daily research.
For me it also helps to avoid the websites that are too political, I feel like there are too many distractions and not enough sharing of actual information that is helpful in moving forward.