I’ve seen several videos of Systema on Youtube which look unrealistic?
Systema is taught using a number of creative biomechanical exercises, and challenging psychological and physical drills, which are designed to re-educate the body at a kinesthetic level. These are designed to elicit various degrees of sensitivity and awareness in the practitioner. Without an accurate explanation of what the drill is trying to accomplish, a third party observer often takes the drill at face value and makes the assumption that the drill is supposed to simulate reality. Taken out of context, the drills seem unrealistic.