I'm afraid it's a bug in how the Clappr player is initialized. As a hack and until we release an update, replace the width and height values with 100% and 100% respectively (use the % symbol). The responsive CSS styling will override this in the end and the player will not have fixed width/height values in pixels.
Fotis / JoomlaWorks Support Team
---
Please search the forum before posting a new topic :)
