2.0.7 for playing out media is just fine and is very stable. Flash templates work fine too.
For HTML templates I would suggest server 2.3. (latest build is very stable and way faster than 2.2)
There’s some libraries that were updated to work with 2.2+ versions:
@rom1 has a very good .net library compatible with .net core.
I also made some modifications to the libdotnet but I find it somewhat limiting.