When I listen to Syd in the posted video, she is a well thought out woman. She has taken on board things that many people far older than she do not understand. She has coping mechanisms for her anxiety. She reminds herself that things are not important, to take a deep breath.
I have been trying hard to understand why Syd withdrew from University. In the book I recently read - a 19 year old in a similar situation to Syd - he never once thought about withdrawing. He many times wanted to (and almost did) end his life.
The college people that I have read about, who have ended their lives, did not withdraw prior.
Withdrawing from University is not a prerequisite to ending your life.
Syd waited around until a refund for tuition should have been issued.
And we no longer know that there have been no sightings. Syd's parents recently stated that there have been tips - tips that have been/are being followed up.