The OVA release is still available on both DVD and Blu-ray and the show is still streaming on HIDIVE as well.
Sentai Filmworks picked up the Utawarerumono OVA series back around 2015 or so and brought the home video release for it out in 2016.
That release look like it included all three of the picture dramas in HD quality that were originally released with the previous DVD release of the OVAs.
Sentai’s release will include those picture dramas as well as the clean opening and closings.