Sorry for the late late reply...working on other stuff.
Yes it worked, both interstitials and rewarded videos.
Thanks for the help Josh.
BUT...
On rewarded videos, there is a null pointer exception shown on log although things look perfect from user's point of view.
12-07 15:27:39.638 514-23747/? I/OMX-VDEC-1080P: component_init: OMX.qcom.video.decoder.avc : fd=51
12-07 15:27:39.638 514-23747/? I/OMX-VDEC-1080P: Capabilities: driver_name = msm_vidc_driver, card = msm_vdec_8974, bus_info = , version = 1, capabilities = 4003000
12-07 15:27:39.644 514-23747/? I/OMX-VDEC-1080P: Enabling default extradata for OMX.qcom.video.decoder.avc
12-07 15:27:39.652 514-23747/? I/OMX-VDEC-1080P: omx_vdec::component_init() success : fd=51
12-07 15:27:39.654 514-23746/? I/MediaCodec: [OMX.qcom.video.decoder.avc] setting surface generation to 526463
12-07 15:27:39.656 514-23747/? E/OMX-VDEC-1080P: Extension: OMX.google.android.index.storeANWBufferInMetadata not implemented
12-07 15:27:39.
659 514-3027/? D/audio_hw_primary: out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=2
12-07 15:27:39.659 514-23735/? D/NuPlayerDriver: notifyListener_l(0xf2eb61e0), (6, 0, 0)
12-07 15:27:39.667 514-23746/? I/MediaCodec: MediaCodec will operate in async mode
12-07 15:27:39.673 514-3027/? D/audio_hw_primary: select_devices: out_snd_device(2: speaker) in_snd_device(0: none)
12-07 15:27:39.673 514-3027/? D/msm8974_platform: platform_send_audio_calibration: sending audio calibration for snd_device(2) acdb_id(15)
12-07 15:27:39.673 514-3027/? I/soundtrigger: audio_extn_sound_trigger_update_device_status: device 0x2 of type 0 for Event 1
12-07 15:27:39.685 514-23747/? D/SurfaceUtils: set up nativeWindow 0xee187b08 for 720x1280, color 0x7fa30c04, rotation 0, usage 0x42002900
12-07 15:27:39.691 514-3027/? D/audio_hw_primary: enable_snd_device: snd_device(2: speaker)
12-07 15:27:39.693 514-3027/? D/audio_hw_primary: enable_audio_route: apply and update mixer path: low-latency-playback speaker
12-07 15:27:39.713 514-23747/? D/SurfaceUtils: set up nativeWindow 0xee187b08 for 720x1280, color 0x7fa30c04, rotation 0, usage 0x42002900
12-07 15:27:39.736 514-23735/? D/NuPlayerDriver: notifyListener_l(0xf2eb61e0), (5, 720, 1280)
12-07 15:27:39.736 514-23735/? D/NuPlayerDriver: notifyListener_l(0xf2eb61e0), (200, 3, 0)
12-07 15:27:39.736 23487-23499/? W/MediaPlayer: info/warning (3, 0)
12-07 15:27:39.944 23487-23755/? I/Ad Lifecycle: ad observable onNext
12-07 15:27:39.954 23487-23619/? E/VungleAsync: error executing {PriorityRunnable:: taskType: otherTask, repeatMillis: -1}
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Boolean.booleanValue()' on a null object reference
at com.vungle.publisher.ea.b(vungle:141)
at com.vungle.publisher.ea$b$3.a(vungle:221)
at com.vungle.publisher.ea$b$a.a(vungle:309)
at com.vungle.publisher.ea$b.a(vungle:223)
at com.vungle.publisher.c.c(vungle:347)
at com.vungle.publisher.e.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
12-07 15:27:39.959 23487-23755/? I/Ad Lifecycle: ad observable onComplete
12-07 15:27:41.
330 916-3420/? D/ConnectivityService: updateNetworkScore for NetworkAgentInfo [WIFI () - 125] to 60
12-07 15:27:41.544 916-934/? I/art: Starting a blocking GC Explicit
12-07 15:27:41.732 916-934/? I/art: Explicit concurrent mark sweep GC freed 15503(1043KB) AllocSpace objects, 5(192KB) LOS objects, 26% free, 44MB/60MB, paused 1.109ms total 187.195ms
12-07 15:27:47.379 916-3420/? D/ConnectivityService: updateNetworkScore for NetworkAgentInfo [WIFI () - 125] to 56
12-07 15:27:48.669 22650-22650/? I/ServiceManager: Waiting for service AtCmdFwd...
12-07 15:27:49.669 22650-22650/? I/ServiceManager: Waiting for service AtCmdFwd...
12-07 15:27:50.
401 916-3420/? D/ConnectivityService: notifyType CAP_CHANGED for NetworkAgentInfo [WIFI () - 125]
12-07 15:27:50.670 22650-22650/? I/ServiceManager: Waiting for service AtCmdFwd...
12-07 15:27:51.302 514-30119/? D/NuPlayerDriver: notifyListener_l(0xf2eb61e0), (7, 0, 0)
------ end log -------