Just tried out the 29/05 build, was mainly just checking out the Camera (Rear), not sure if the changes posted few days ago were directed at the video side of things but it's working pretty well in this build from what I've tested so far, though I find when playing back videos using the stock Gallery app, they playback very choppy, but using something like VPlayer they appear to playback as you'd expect, minimal lag, no artifacts on screen etc.
Tested both stock Camera & Google Camera (Play Store), no issues with 720p video recording, both performed equal in regards to video, now switching to 480p results in visual artifacts/lines across half the screen, viewfinder images stick & jump continuously until you close the app, pretty unusable on that setting, same results on both Camera apps, anyway I'm not sure why anyone would use 480p over 720p but I still tested it, probably better to remove that option (480p video) altogether if possible unless it can be fixed that is.
As previously reported already, front facing Camera FC's after about 1 second if try to video record, tested with both stock Camera & Google Camera, same results, taking pictures is fine on both.