Rat 7M Videos Subject 2 - Day 1

All videos for Subject 2, Day 1 in Rat 7M. The video naming scheme is s{subject_id}-d{recording_day}-camera{camera_id}-{starting_frame_idx}.mp4. Subject ID, recording day, and camera ID match videos to the data in the motion capture and camera calibration parameter .mat files. Videos are provided in 3500 frame chunks, with the index of the starting frame in each file denoted by the {starting_frame_idx} portion of the filename. Using the 'frames' field in the 'cameras' struct inside 'mocap.mat', the corresponding video file and frame index can be calculated by used frame_idx // 3500 to get the {starting_frame_idx} and frame_idx % 3500 to get the frame in that file.