In aikido, there are names for few types of ukemi, basically based on the direction of the fall: mae, ushiro, yoko. But when you start looking closer, you notice there are subtypes especially to yoko ukemi. I’ve been trying to identify the differences between the types, and because there is no [known] terminology for those, these are the ones I currently use:
Judo style @ 0:06, 1:30: Uke’s body is straight and the landing is flat. Uke doesn’t try to come up, but rather just spread the impact to both side of the torso and legs. The contact is in one phase: hand + side + leg: 1.
French style @ 0:17, 2:02: Uke’s upper body bends sideways. This way the the torso can receive the throw and the free hand can start reaching for tatami; the legs come last and the whole ukemi is very elastic. On landing, the hand touches the tatami first, then side of the torso, and side of the lower leg last. The feet are bent, thus when the momentum of the ukemi continues to move uke in sideward direction, uke seemingly lands on their feet. The contact is in two phases: hand, side + leg: 2.
Swedish style @ 1:54, 2:47: This is version of the French style, but easier to learn. Like in the French style, the body bends sideways and the free hand touches tatami first. However, the legs are straighter and when the lower leg makes contact, uke starts to turn their back to nage and shifts their weight from side to side. The result is contact in three phases: hand, side + leg, leg: 3.
The judo style usually comes about when the throw has not outward momentum, it’s just a fall/drop. In most cases the French and Swedish styles are interchangeable, but the French requires more outward momentum and early grip release.