The fascination with "Lara Croft in trouble" is not morbid. It taps into three core storytelling mechanisms:
Because these animations use copyrighted characters (Lara Croft, owned by Embracer Group/Crystal Dynamics), they exist in a legal grey area. Most companies tolerate fan art and non-commercial fan films as long as creators do not sell the videos directly (Patreon is a tip jar for time, not for the IP). You are safe to watch and download for personal use. However, do not repost these animations to your own channel or sell them on a DVD.
When downloading "full" animations, stick to known platforms. Avoid sketchy .exe files masquerading as video players. Use reputable video downloaders for YouTube or Vimeo only.
Despite being an art site, many Flash and MP4 animations are hosted here. Use the search term "Lara Croft peril animation complete." Look for "Sta.sh" or "Download" buttons.