Remove 4 manually reviewed S20 episodes
Remove four S20 episodes selected during manual video review: episode_000007, episode_000011, episode_000015, and episode_000033.
The change deletes all three camera views for each selected episode (12 MP4 files), removes their trajectory-index rows, and updates task metadata, the dataset manifest/checksum, and README counts. S20 retains 31 episodes / 93 videos, with 25 train and 6 validation samples. Dataset and split versions become 1.4.1.
Original episode numbers, all surviving train/validation assignments, and other tasks are preserved. Dataset totals become 1,007 trajectories (803 train / 204 validation) and 2,703 videos.
Validation: all 12 removed video hashes and sizes match the reviewed revision; all 93 retained S20 video references resolve with matching hashes; retained metadata rows and other task records are unchanged; JSON, counts, split membership, and the trajectory-index checksum are consistent.