#OpenBSD gains (open) Widevine DRM support on Chromium. This will fix compatibility with a large number of streaming services.
Please do note that Widevine has three security levels. Platforms can dictate what level they require. For instance, Netflix only allows SD (480p) playback at L3 and limits 4K to L1.
L1 requires secure boot, a signed and approved kernel, etc. This is not going to happen. Not on the BSDs, not on Linux.
Have yet to experiment with it - I presume it will default to L2. That is 720p playback on Netflix, if I am not mistaken.