There are some You Tube videos that are specifically focused on safety for example:
Naturally I chose the table saw because it is the foundation of most woodworking shops, and because it is the least understood machine AND therefore the most dangerous! Second on my "most dangerous list" is the table mounted router because feed direction is so important. If you "climb cut/feed" it will rip the stock right out of youe hands and sens it shooting across the room at between 55 and 100 MPH.
Drill presses are the least suspect, but can be dangerous IF the bit sticks in the workpiece and it starts to spin around while you try to stop it while getting your hands sliced up and the OFF switch is typically not within reach. A foot operated momentary ON/OFF switch can solve that issue, but I rarely see one in use.
Wood lathes with the rotating workpiece can grab your shirt sleeves, OR your long hair if it's not tied back. Folks have been scalped when this happens, unfortuately. The workpiece can come loose and fly off as well. The cutting tool can jam unexpectedly and get throw off.
The jointer is basically a simple machine and potentially dangerous, but a push block should be used when possible on pieces shorter than 24" and very thin stock, 1/2" and less.
The thick planer is also a simple machine and it has power feed so there's not too much danger from kickback, but again NO short pieces! 18" is the minimum in my opinion.
The bandsaw is relatively safe during the cutting operation, BUT once the cut is completed, the entire exposed height of the rapidly spinning blade is a potential hazard. Keep hands and fingers well away!
One controversial machine is the Radial Arm Saw and it requires a separate lesson, since it is the most complicated machine to properly set up and operate safely. Guards should be in place whether using it to crosscut, rip or as a shaper.
Physics plays an important role in using high speed cutters on all these machines, so a basic understanding of how blades cutters enter the workpiece, and what happens after that is relevant.
The debate over the flesh sensing safety Saw Stop blade brake will always be a topic of discussion. Where there are inexperience folks using the saw, it's probably the best "insurance" against a blade injury, BUT it will do nothing to prevent a kickback. Physics plays an important role here.