@LaboremEdge it seems like this is issue in Vimeo. I tested slider on iPhone simulator and getting error “This video can’t be played with your current setup”. As I found out from Vimeo’s support forum you will need to convert video to mobile version (it requires Premium membership).
You can read about this issue in this topic.
I recommend you that you contact Vimeo support and ask for help with this.
Vladimir
