[Fire HD 8 and HD 10 Original Android Development] jibgilmon:
I can reproduce the youtube issue.

10-03 00:46:16.199 7152 7160 E MtkOmxVdecEx: [0xebc04800] @@ OMX_GoogleAndroidIndexEnableAndroidNativeHandle: invalid port index
10-03 00:46:16.199 7152 7160 E OMXNodeInstance: setParameter(0xebc04804:MTK.DECODER.VP9, OMX.google.android.index.allocateNativeHandle(0x7f20040e): Output:1 en=0) ERROR: BadParameter(0x80001005)
10-03 00:46:16.202 7152 7160 E OMXNodeInstance: getParameter(0xebc04804:MTK.DECODER.VP9, ParamVideoProfileLevelQuerySupported(0x600000f)) ERROR: BadParameter(0x80001005)
10-03 00:46:16.204 7152 7160 E VDO_LOG : vResult fgDrvInitFlag FALSE
10-03 00:46:16.204 7152 7160 E MtkOmxVdecEx: [0xebc04800] [ERROR] Cannot get param: VDEC_DRV_GET_TYPE_GET_FRAME_CROP_INFO
10-03 00:46:16.204 7152 7160 E MtkOmxVdecEx: [0xebc04800] MtkOmxVdec::GetExtensionIndex Unknown parameter name: OMX.google.android.index.configureVideoTunnelMode
10-03 00:46:16.205 7152 7160 E MtkOmxVdecEx: [0xebc04800] MtkOmxVdec::GetExtensionIndex Unknown parameter name: OMX.google.android.index.useAndroidNativeBuffer2
10-03 00:46:16.205 7152 7160 E MtkOmxVdecEx: [0xebc04800] MtkOmxVdec::GetParameter unsupported nParamIndex
10-03 00:46:16.205 7152 7160 E OMXNodeInstance: getParameter(0xebc04804:MTK.DECODER.VP9, ParamVideoAndroidVp8Encoder(0x6f600007)) ERROR: UnsupportedIndex(0x8000101a)
10-03 00:46:16.205 7152 7160 E VDO_LOG : vResult fgDrvInitFlag FALSE
10-03 00:46:16.205 7152 7160 E OMXNodeInstance: getConfig(0xebc04804:MTK.DECODER.VP9, ConfigCommonOutputCrop(0x700000f)) ERROR: BadParameter(0x80001005)
10-03 00:46:16.211 7152 7160 E ion : ioctl c0044901 failed with code -1: Invalid argument
10-03 00:46:16.223 7152 7160 E MtkOmxVdecEx: [0xebc04800] MtkOmxVdec::GetExtensionIndex Unknown parameter name: OMX.google.android.index.AndroidNativeBufferConsumerUsage
10-03 00:46:16.223 7152 7160 E OMXNodeInstance: setParameter(0xebc04804:MTK.DECODER.VP9, ParamPortDefinition(0x2000001)) ERROR: BadParameter(0x80001005)
10-03 00:46:16.223 7152 7160 E VDO_LOG : vResult fgDrvInitFlag FALSE
10-03 00:46:16.224 7152 7160 E MtkOmxVdecEx: [0xebc04800] [ERROR] Cannot get param: VDEC_DRV_GET_TYPE_GET_FRAME_CROP_INFO
10-03 00:46:16.224 7152 7160 E MtkOmxMVAMgr: [0xec5a38b8] [ERROR] Can not find MVA from VA: 0xec5d20f0
10-03 00:46:16.257 546 598 E GuiExt : [GuiExtI] alloc:bad argument, token=0xf4ea6680, gralloc_usage=0x2933, w=896, h=512, poolId=0xf4c837a8
10-03 00:46:16.257 7152 7365 E MtkOmxVdecEx: [0xebc04800] SetupMetaIonHandle GuiExt alloc return error
10-03 00:46:16.263 7152 7366 E VDO_LOG : open OK, VCodec_ValFd=13
10-03 00:46:16.265 7152 7366 E BWC : fail to open mem_bw_ctrl driver file
10-03 00:46:16.265 7152 7366 E BWC : Failed to switch EMI profile, error: -1
10-03 00:46:16.273 7152 7366 E VDO_LOG : [WRAPPER] Wrapper's handle : 0xe65057a8
10-03 00:46:16.273 7152 7366 E VDO_LOG : GetDecoderAPI hWrapper 0xe65057a8
10-03 00:46:16.273 7152 7366 E VDO_LOG : [WRAPPER] Get VP9 Decoder Handler
10-03 00:46:16.273 7152 7366 E VDO_LOG : @@ dlopen CODEC_DEC_VP9 +
10-03 00:46:16.273 7152 7366 E VDO_LOG : @@ first use vp9 dec, so dlopen libvp9dec_sa.ca7.so
10-03 00:46:16.274 7152 7366 E VDO_LOG : @@ [ERROR] dlopen failed, dlopen failed: library "libmmprofile.so" not found
10-03 00:46:16.372 584 584 E /system/bin/tombstoned: Tombstone written to: /data/tombstones/tombstone_29
10-03 00:46:16.391 7193 7364 E ACodec : OMX/mediaserver died, signalling error!
10-03 00:46:16.391 7193 7364 E ACodec : signalError(omxError 0x8000100d, internalError -32)
10-03 00:46:16.391 7193 7363 E MediaCodec: Codec reported err 0xffffffe0, actionCode 0, while in state 6
10-03 00:46:16.392 7193 7359 E ACodec : OMX/mediaserver died, signalling error!
10-03 00:46:16.392 7193 7359 E ACodec : signalError(omxError 0x8000100d, internalError -32)
10-03 00:46:16.392 7193 7359 E MediaCodec: Codec reported err 0xffffffe0, actionCode 0, while in state 6
10-03 00:46:16.393 7193 7359 E ACodec : signalError(omxError 0x80001001, internalError -2147483648)
10-03 00:46:16.393 7193 7359 E ACodec : signalError(omxError 0x80001001, internalError -2147483648)
10-03 00:46:16.393 7193 7359 E MediaCodec: Codec reported err 0x80001001, actionCode 0, while in state 0
10-03 00:46:16.393 7193 7359 E MediaCodec: Codec reported err 0x80001001, actionCode 0, while in state 0

Possibly related? https://github.com/amzn/exoplayer-amazon-port/issues/81

https://bugzilla.mozilla.org/show_bug.cgi?id=1542956

https://github.com/flutter/flutter/issues/16178

Edit: Looks like [MENTION=8491352]tek3195[/MENTION] is also working on ROMs for a similar device - https://xdaforums.com/general/help/how-to-unlock-root-xposed-onn-8-walmart-t3945284/page10