You should use the verb *favourite* and not *favour*. [*Favour*][1] means *show an approval or preference for*, while [*favourite*][2] means *record to enable quick access*. It is true that you favourite a video on a website if you like it, but the sense you want to convey here is not that you like the video but that you mark the video in some way.


  [1]: http://oxforddictionaries.com/definition/english/favour
  [2]: http://oxforddictionaries.com/definition/english/favourite