I've stumbled across something by accident. In researching a problem, I found that my channel uses BIF files for some of my videos even though I have not coded them in my feed file. Again, some of my feed files show a Trick Play image when I fast forward through the video. Others do not. I have not been able to identify what triggers it. Has anyone else observed this?
Windows desktop software for creating and managing MRSS, JSON, and FireTV feeds https://github.com/rrirower. No Programming, JSON or MRSS knowledge required.