Go to the main page of the forum, scroll down under General Discussion, directly beneath it is a section called Bloodlines. If you go even further down, there's a section called Bullies 101. I recommend you read both of those sections, as well as the thread in General Discussion titled "For the Newbies". Without papers, you'll never know what you have. With so much going into the mix now days for Am Bullies, I really couldn't tell you. He looks like a bully breed of some sort, be it American Pit Bull Terrier, American Staffordshire Terrier, American Bully or whatever. I'm no expert and I don't claim to be. I know I have an APBT based on her bloodlines/pedigree, which I have. The best thing I can tell you is you have a great dog, and you should love him and protect him as such, and he'll do the same for you.
Okay from this picture you just posted, he does look a little over weight, IMO. I tend to keep my dogs on the leaner side, as it's healthier for them in the long run, but he is still a pup, so there's no harm in keeping a little extra weight on him. During the winter time, it'll definitely help him if it gets cold where you live.
Honestly, I can't really see much with him sitting and the angle of the photo having been from above him instead of on his level (you standing over him pointing the camera down instead of squatting down to get a head on view of him). I suggest you take a look at some of the pictures I've posted of my two, and notice how I get down on their level to take a picture instead of towering over them. It's easier to see size/build from a head on, straight forward view. He is cute, and 56 lbs at 7 mos old seems just a bit big, but I'm guessing you're keeping him stocky?
I can see it just fine. Not a good position for me to give my opinion though (meaning him sitting, I can't see much). You can't post movies to your profile, but you can post them on the forum, via copying and pasting from youtube or photobucket.
I'm sorry, I don't have any experience using an Android, or the mobile app for photobucket. All I know is that you copy and paste the Image Code (3rd from the top of the list on each picture) into the thread you're trying to post on. If you're picture is too big for the forum's specs, it will be removed until you resize it.
I can definitely help you. If you've got a photobucket account, you just copy the Image Code (looks like [IMG] CODE [/IMG] ) and post it into the blank space when you're starting a new thread. Depending on your post count (how many times you've posted on the forum) you can upload directly from your computer by going advanced and clicking on the paper clip icon at the top in the tool bar of your box, and then you'll select choose file (it will say no file has been chosen yet), after you select the file you want to attach, then you click upload, and close the window and then submit reply or post new thread. Hope that helps you out some.