I do not doubt that Ms Maserati told the YouTuber what was reported in the Sun, but while I think there are probably shreds of truth in her story, I think there are a lot more misstatements and outright lies. I tend to believe that HP may have been placed in the trash chute, as LE has been searching the landfill that accepts H+F's trash, for some three weeks now. Clearly, they believe that her remains and/or other personal belongings are to be found there.
Having said that, how coincidental is it that Heidi was allegedly placed in the chute on the 40th floor, and managed to get down 12 floors before getting stuck on the very floor that her dog was allegedly found wondering on? I'm not buying it. Also, I saw or read somewhere (that probably can't be linked here) that a key fob is required to access the trash chute door, and residents' key fobs only allow access to their floor and commons floors. How likely is it that MM (Mas Mama) COULD have gone down every floor checking chutes, even if she had been asked or wanted to? If she was checking every floor to make sure a body made its way to the bottom, she was far more involved in whatever happened than just being a spectator who later decided to get a conscience and spill her guts to some unknown YouTube real-crime poster. I do believe Heidi died in that building that evening, but I believe her story may be about 10% true and 90% CYA. JMO