A recent systematic review and meta-analysis explored the validity and intra-session reliability of 2D video analysis for measuring kinematics during running. Even though a limited number of studies analysed validity and reliability, data suggests that some angular outcomes such as peak knee flexion and knee range of motion during stance present strong validity compared to gold-standard 3D motion capture systems. Intra-session reliability was strong for outcomes where two or more studies were present. These data shows that 2D video can be used to obtain some but not all outcomes from runners and reliability could be used for gain retraining within a session.