Summary:
The most important table saw safety accessory is the blade guard. It prevents kickback, which occurs when the wood pinches against the back of the saw blade and shoots the workpiece back at you. If your saw doesn't have a blade guard, you must use a riving knife or an aftermarket splitter.
Here are other safety tips mentioned in the video:
Wear safety glasses and hearing protection.
Use push sticks or push blocks to keep your hands away from the blade.
Use a metal detector to check for nails or other metal objects in reclaimed lumber before cutting.
Make sure your saw is properly aligned and that all safety accessories are in place before using it.
Inspect your saw before each use for any damage.
Ask yourself four questions before each cut: am I tired, am I distracted, am I in a rush, and am I sure?
Remember, table saws are dangerous tools, so it is important to always use caution and follow safety procedures.