I've not had this issue since the redesign, but now, today this started again. ios 8.3, ipad mini 2. both chrome and safari tested.
I can't make pinching or any other gesture to get a proper full screen.
I'm using the iOS 8.3 on an iPad Air and am noticing the same thing.
It looks like the videos are using Giant Bomb's video player instead of the normal iOS video player now. You can tap the video to bring up the video controls, which will let you enlarge the video; however there doesn't seem to be any way to get it into full screen. It also looks like gesture controls no longer work. This just started today.