Usability Issue in Full Screen, when a user move from Mobile to Desktop

I generally browse IMDB from my Mobile. Today when I was watching a trailer from my laptop, I saw a > arrow, I thought that makes the screen full-screen like how it is in the Mobile, but to my irritation, it moved to the next video.

My suggestion is a) Please make the Full-screen button more prominent when someone is watching the trailers from desktop via web-browser, because that is the first thing most user will do when they are playing a trailer and b) try to use the same icon and symbol for full-screen for both your mobile app and web app. There is less of a learnability curve for a user moving from website to mobile app and vice versa.
Thanks & Regards,


Robert