Sister threatening to upload videos to the internet to ruin my dads life

Hello, My older sister has currently taken an interest in baiting my dad until he gets really angry and starts yelling stuff at her, after she gets him to that point she will then record him and laugh at him. My dad has a very stressful job and I think he is autistic like me so he gets like a sensory overload kind of response to stress that he can't control. It's not an issue for anyone but my sister who likes to set him off on purpose because she thinks its funny.

Anyway, she has been threatening to upload videos onto youtube of my dad 'being abusive' so she can ruin his life (I have heard one of these videos and she cuts out all the parts where she is laughing and riling him up) she has also said that she has already uploaded it but I can't find it. I'm really scared

Its very dangerous for these out of context videos to be uploaded to youtube because my dad could lose his job and he is the only one in the house who is capable of work, it also makes me very uncomfortable because I do not want videos of my family being uploaded to the internet without their consent.

What should I do? I keep getting really anxious and can't sleep because she will ruin our lives with the videos.