I notice that on iOS you do not require Flash, but on a PC there's no option to use HTML5. I'd really rather not run Flash due to all its vulnerabilities, why don't you allow HTML5 use on desktop?
Thanks for being in touch. We are currently working to move Concert Window streams away from Flash entirely and hope to have this completed in the near future. It’s a fairly big overhaul for us. At the time the web app was built, there wasn’t universal browser support for html5 and Flash was our best option for low latency live streaming.
We’re working hard to implement this change but want it to be working before we go live with it! Thanks for your patience.