Updated README.md with new video thumbnail, and simplified text, added spoiler…

Updated README.md with new video thumbnail, and simplified text, added spoiler to install instructions
4 jobs from flee-crash in 2 minutes 25 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #39102
minecraft
build_mod

02:25

 
  Test
manual #39103
minecraft allowed to fail manual
gpt-3.5-turbo
manual #39104
minecraft allowed to fail manual
gpt-4o
manual #39105
minecraft allowed to fail manual
llama3-8b