If you are unsure if you have HTML5 (All Device) channels or Legacy Flash channels on your account, you can find this out under the "Type" area when looking at OVERVIEW. The icon for each will be different.
This can be seen below. The Flash icon is a red F, as seen below for the channel called 'Racing live', while the other channels have an orange shield icon with a 5 inside of them.
Unfortunately RTMP (Flash) stream delivery is being discontinued by Verizon Digital Media Services, our current CDN partner for flash live channels. Hence all existing Flash channels will be reset on HTML5 channels.