I've joined a few car clubs over the years, and USB sticks are a common bit of logo'd merchandise. Trouble is, they are always tiny capacity, and of no real use. I see them as a waste of money for the club, and a waste of time for the recipient. Pens are perhaps better - everyone uses them, and they can be used at work too, whereas USB sticks are frequently (hopefully trending towards totally) banned from the workplace. A flyer with a link to hosted videos will be much cheaper than any sort of media - people only watch them once and throw them into the bin or the back of a drawer.
Car window stickers are cheap and usually well received. Biggest bang for the buck has to be getting a couple of the wing-style banners, such as the Maserati MD loaned us for Brunty last year. They pack to the size of an umbrella, so will go into any boot. Similarly, a pop-up gazebo will go into any Maser boot, so shouldn't be a problem getting them to events.