New intro video

[Oliveriver]

Brief Description of What This PR Does

Amazing new intro video courtesy of QuantumCrab.

Related Issues

N/A

Progress Checklist

Note: before starting this checklist the PR should be marked as non-draft.

• PR author has checked that this PR works as intended and doesn't
  break existing features:
  https://wiki.revolutionarygamesstudio.com/wiki/Testing_Checklist
  (this is important as to not waste the time of Thrive team
  members reviewing this PR)
• Initial code review passed (this and further items should not be checked by the PR author)
• Functionality is confirmed working by another person (see above checklist link)
• Final code review is passed and code conforms to the
  styleguide.

Before merging all CI jobs should finish on this PR without errors, if
there are automatically detected style issues they should be fixed by
the PR author. Merging must follow our
styleguide.

[buckly90]

Seems to work perfectly, consistently, and with no errors that I can identify.

[hhyyrylainen]

Everything looks to be fine, though the video is 24 FPS instead of 30, but that doesn't seem that visible of a difference so I'll just merge this right away (replacing the file anyway in the future keeps both in git LFS)