dialogue: Veronica: heyo, I sent you the files by wetransfer
  Erica: cool, thx!
  Veronica: let me know if they work ok
  Erica: yup
  Erica: hey, the video file has some artifacts at the beginning
  Veronica: what? 
  Veronica: <file_gif>
  Veronica: i watched it through before sending :-/
  Veronica: oooh, ok I see now
  Erica: yeah, could you please reexport it?
  Veronica: yup, on it
  Veronica: give me 30 min
  Veronica: sorry :-/
  Erica: it's ok, good thing we caught it now ;)
  Veronica: :-D
summary: Veronica sent Erica a video via WeTransfer. There are some artifacts in the video. Veronica has to reupload it.