One woman who stayed across the street from Miami's high-rise collapsed partially last week recorded video minutes prior to the collapse, which showed water leaking from its base.Roberto Castillero said that his wife took the video and later posted it to TikTok. She added a caption in Spanish, "The basement was the first to collapse." The video shows water rushing down from the garage at Champlain Towers South, Surfside.TikTok footage seems to show water leaking out of the garage at Champlain Towers South just before the building collapsed. (Adrian Castillero/ TikTok).Castillero claimed that he was with his wife at Bluegreen Vacations Sunside Resort, which is located across from the doomed high rise.He said that she took the video at 1:15 AM Thursday. At 1:30 AM, half of the building was flattened.Investigators are still trying to determine what caused 55 units of the Northeast corridor of the 12-floor building's collapse.Surfside released a treasure trove of emails, documents and other information that revealed that residents and contractors have been raising concerns about its integrity for years. They mainly focused on structural issues in the garage and the pool area.The Miami Herald was contacted by a commercial pool contractor to inspect the pool. He said that standing water was all over the garage and the largest puddle was under the pool deck at parking spot 78. In 2018, he had reported "major structural damage."Photographs taken by a contractor show conditions in the Champlain Towers South pool control room days before its collapse. (Miami Herald).Concrete slabs that were in distress at the pool deck and entrance should be removed and replaced.The report was not made public to residents. It was required by the Miami-Dade County Building Code. A Surfside buildings official informed them that their condo building was in good condition after the report had been compiled.Champlain Towers South Board President Jean Wodnicki wrote to residents in April revealing that concrete deterioration was accelerating.This letter explained why a $9 million renovation had cost more than it did in the original estimate. It also confirmed Frank Morabito's 2018 prediction that "the damage already done to the building would continue to multiply exponentially."