Please test latest OrangePi PC2 (H5) image:
LibreELEC-H5.arm-9.80-devel-20200308081621-cfb1324-orangepi-pc2.img.gz
If it is good enough, it will be merged into official LibreELEC git repository and nightly images will become available soon thereafter.
I don't know if it's been already confirmed by other people, but I tried your image today and as far as I could see it works fairly well. I've used an H5 Orange Pi PC 2 I had lying around, and tested it with SMB/CIFS shared files of various codecs, Twitch streams and Widevine encoded movies from PrimeVideo. I didn't test performance/framerates, but as far as I could tell everything worked.
I've only used LibreElec x64 a few times, but if you need some specific tests to run on an H5 I can maybe help.