Start by removing the table so you can see everything from above. Then print off a copy of the parts breakdowns and have them close at hand. I don't think it will be too hard to figure it out. Another thing, if it still runs at all, try to isolate where the sound is coming from. Use a mechanics stethoscope if you have one or a wooden dowel held to the saw in different places and softly put up to your ear. The sound will transmit. A rubber hose or tube will work too. Do the arms still go up and down? How are you trying to add the video files. If you have them saved to your computer, it's just a matter of adding them right down at the bottom where it says "choose files". They will attach to your post.