CZ_6B5Y5lKo (22:37-23:16) and qJhXMdSBNUM (56:47-57:46) have an undecodable H.264 span each. Both videos and their 5 questions are removed; 353lHGbvu8o and Wl7hAXbOuBQ replace them with 5 questions from the same vetted pool, keeping 1000 questions / 561 videos and the 250-per-bin time balance. The previous state is tagged v0912.
