Comment by ffsm8

Yes, I think everyone, including the author of the article will agree that you've quoted the one sentence thats about playback. I agreed on that from the beginning as well. After all, after you've modified a video file, you will want to check if it looks as desired. You want a video player for that, ideally one that doesn't ignore things for improved compatibility.

The point was that the rest of the article wasn't and if you unironically can't tell that, then you should seriously train your reading comprehension.