there is no video from the front porch on the second arrival of the police. It either was turned off by the cops or what intentionally not given to the youtuber. The answer to this could be either or due to the fact the officers first arrival turned off camera. Suspiciously the youtuber doesnt mention why there is no video of porch on 2nd arrival and that could mean that it showed cops finding no key under the mat. Not enough info cant make judgement