Unity learn platform. Web player issue

I tried to watch some of the unity premium courses, but encountered one issue. The web player that used to play those videos, does not play them in full length. The description say's that length of the video is 5 min, but player cut's it in a half. I tried use the Firefox instead of Chrome, but got the same result.The player cut's videos in the half that were published by Pluralsight. Does anybody experience the same issue or it's just me?