Documentary opening song identification

Hello everyone,

It's a long time now that I'm trying to identify the opening (and closing) song of a documentary I watched many years ago.
This is the link: https://youtu.be/_pJii4_7XyQ?t=1m47s
It is set to start when the opening song begins.

I couldn't find any other episode or better quality of the said documentary on YouTube or other sites.

Any help would be appreciated.

Possibly a piece by Rimsky-Korsakoff. You might try contacting the production company.

Somehow remindme of the Excalibur movie theme O Fortuna

https://www.youtube.com/watch?v=t6Hp2WANepc