If you can't watch it for whatever reason, heres a rundown: sunsingers can swap from their self rez (fireborne) perk to the radiant skin perk after death and still revive. Not only can they revive, but they lose all the downsides of using fireborne (-7s super duration), and actually gain the benefits of radiant skin or song of flame. We've had an Iron banner where tether hunters roamed wild, a banner where sunbreakers crushed all opposing them, so keep an eye out for flaming warlocks if this isn't patched in tomorrows update.