This video is already a little dated. It is from May 12th when Brodin was doing his very funny looking army crawl. Brodin is now crawling pretty fast on all fours, cruising nicely on furniture and his new trick (starting just yesterday) is being able to stand by himself for about a minute without falling. I'll try to catch a video of that.
At Brodin's 9 month appointment he was 21 1/2 lbs and 28 inches. Enjoy!