Non-inertial Frames of Reference | 0:47: The ball accelerates (i.e., follows a curved path) even though no horizontal force (other than static friction to cause rolling) because it's in a rotating reference frame which is a non-inertial frame. From the perspective of the approximately inertial frame of the ground, the ball rolls in a straight line just as Newton's 1st law of motion says it should. Both the inertial forces the centrifugal force and the Coriolis force are acting on the ball: the first just by being in a rotating reference frame and the second because of moving relative to the rotating reference frame. Good for the classroom.
Top 5 Space Experiments | 10:28: There's a jump to the 4:20 mark. The International Space Station (ISS) is a free-fall frame (i.e., an exact inertial frame), and so Newtonian physics can be referenced directly to the ISS frame and everything behaves completely normally---except for weightlessness of course. Gravity is NOT turned off in space. In low-Earth-orbit, gravity is almost the same as on the Earth's surface, but but gravity pulls on everything equally and nothing resists it: everything is in free fall. A few bits are good for the classroom.
Guys Play Catch While Skydiving | 0:48: Playing catch the way it should be done. Because of air drag, varying air drag, and probably some level of clear-air turbulence, the system of these 3 bold skydivers is NOT an exact inertial frame, but it's NOT so far from one.