2.3 Video analysis
All videos were analyzed in Boris Video v7.9.1. BORIS (Behavioural Observation Research Interactive Software, University of Torino) is a free, open-source and multiplatform standalone program that allows a user-specific coding environment to be set for a computer-based review of previously recorded videos or live observations (Friard & Gamba, 2016). The software has been used in study behaviour of human, farm animals, and wildlife (Aletta, Lepore, Kostara-Konstantinou, Kang, & Astolfi, 2016). In BORIS, once the coding process is completed, the program can extract a time-budget for single or grouped observation automatically and present as an at-a-glance summary of the main behaviour features (Friard & Gamba, 2016). Data of behaviour duration and frequency was recorded and conversed to excel files.