For manual 35mm cameras
Load Film
Here is a video on how to load film
Some additional points:
1) if your tab snaps out of the slot just try again; when you wind it make sure gears catches sprocket holes
2) don't forget to set your ISO
a) this is usually on your shutter speed dial-- pull up on the outer ring and turn until 400 shows through window
b) some cameras have this dial with the rewind knob instead-- push down on the button and turn to 400
c) some cameras will set this automatically-- if you have a series of silver beads on inside of camera where you insert the film canister than this will set automatically
3) do not open camera until you rewind your film
Rewind Film
Here is a quick video on how to rewind film
Some additional points:
1) on manual cameras you must push the release button and then hand wind your film in the direction of the arrow until it is all back in the film canister;
2) if you do not push the release button and you go to rewind you will rip your film and ruin your photos
3) on automatic cameras it will usually rewind after you take the last photo