<p>Would <a href="https://superuser.com/questions/877415/pattern-recognition-for-youtube">such question</a> could find place here?</p>

<blockquote>
  <p>I am looking for software that would allow to match supplied image in
  video frame. I plan to use it to data-mine Hearthstone videos to get
  data on what decks are better.</p>
  
  <p>Couple of years ago I saw a guy (I think he's Ukrainian) to
  demonstrate something similar. He would print screen live feed from
  his web cam and then would cut part of image and then supply it to the
  pattern recognition software he was running and it would apply border
  on matching part on live feed while he was moving camera. It would
  match it under certain angle. Since Hearthstone cards are always face
  up it should be possible to reuse this. I tried looking for this video
  and software without luck. If you know a peace of software that could
  do something similar(with some tweaks perhaps) or other good idea how
  to get my hands on Hearthstone game data please let me know.</p>
</blockquote>
