Most of the roaster manufacturer channels on YouTube are mostly about selling their own roasters - as one would expect.

Folks here are probably familiar with all the videos that Mill City has done http://www.youtube.com/channel/UCfpTQQtvqLhHG_GWhk3Xp4A

Giesen http://www.youtube.com/channel/UCKQisUtQ1RQLtwILHdKEm0Q has been running a series of seminars with Willem Boot, and Mr. Boot always has interesting opinions. I presume that the original webinars were for Giesen customers, but the captured sessions are in a playlist: http://www.youtube.com/playlist?list=PL ... WuppwWXxvi

Probat http://www.youtube.com/channel/UC8Ghe3SmphkVUoTd_Kx347g seems to be just starting into webinars with their "Pop-Up" series. Their content seems aimed at industrial roasters, but that perspective can still be tangentially interesting. Today's captured session was on degassing, storing, grinding: http://www.youtube.com/watch?v=kFoJamPWRkQ Home roasters probably never think of degassing, but if you want to make bricks of ground coffee, then controlling degassing is a big deal ...

Today's Probat live video was on their new colour measurement system. Forget bean temperature, this device tracks colour temperature during a roast.

The video isn't aimed at home roasters , but it's fun watching the 120kg drum roaster for a bit ... but for the meat:

2:39 to 2:50 - to see the colour sensor itself
17:30 to 20:30 - to see the BT and colour curves

http://www.youtube.com/watch?v=m8DEQc2AkCM