In case you didn't know, there is an interesting channel on YouTube (Zabytki Nieba - Monuments of the Sky) dedicated mostly to reviewing of specific aircraft models, many of them being gliders. It's in Polish, but some of the newer videos have English subtitles.

To give you an idea what it is like, here is one about the popular Blanik L-23 from 5 months ago:

https://www.youtube.com/watch?v=fP7aWtmthZ0

Enjoy!