I'm not 100% sure (as i've never owned an iPhone) but I think that downloading the football league app enables you to use player. I'm only guessing based on a similar thread from a couple of weeks ago about the same issues on the Samsung Galaxy S5. I'll see if I can find you the thread.
I watch it through the football league app.https://itunes.apple.com/gb/app/football-league-official-clubs/id385520353?mt=8 Sent from my iPhone using Tapatalk
football league app, don't think Flash is even supported on Android phones now which a few years ago was seen as something that set them apart from Apple. To be completely geeky, there's really no reason why anyone should be using Flash video anymore, HTML5 can handle video much better and there are very few compatibility issues with that.
You need that football league app the Fishplate posted log in with your barnsley player details and you have all the videos and matchday commentary, for every league club.