The IDF was in Hollywood giving showings of a feature length documentary about the October 7th event, including tons of footage of Hamas training for it, before the end of that month. I work in movies. It takes more than 3 weeks to put together a feature length film from all the footage. The only possible explanation is that the IDF had the footage before the event. And if they did, you have to ask two things - 1) how, and 2) why didn't use that information to stop the attack?