Here are a few compilation videos highlighting the Ryukyu martial arts. Many of the masters in these videos were in their 70s or 80s when this footage was recorded. I hope you find them inspirational and that they help you to see the practice of Ryukyu martial arts as an endeavor that lasts a lifetime (hopefully a very long lifetime).
Here is one more video. It is an advertisement for a 2 part set of DVDs available at Amazon.com. These DVDs are well worth owning IMHO. The are many useful and interesting tidbits on these including Senaha shinshi's discussion of Okinawan kiko / kokyu-ho.
"3 Major Schools of Okinawa Karate" Part 1 and Part2