Report.tex file is given below the player.  If you can't find it, please visit https://spoken-tutorial.org/watch/LaTeX/Report+Writing/English/, and look for it in the "Code files" section.

Yes, the video may show an earlier version of the software.  But the beauty of LaTeX is that not much has changed in years.  To give an example, LaTeX documents that I created in the 90's still compile correctly!