I will answer your questions in order in which they were received:
1. Generate Thumbnail after uploading video via ‘Add Media’ in a post
2. Yes, v 4.4.2
3. I’m getting, where the sample video is supposed to be:
Service Unavailable
The server is temporarily unable to service your request. Please try again later.
Reference #6.ac111cb8.1423255712.13916af3
4. There is no ffmpeg settings tab on the plugin settings page
5. No, it was accidentally missed, but I can re-run the test with that included if it helps.
Thanks!
Jesse