Short answers, pulled from the story.
The NFL Network launched its Thursday Night Football package on the 23rd of November 2006. The Kansas City Chiefs defeated the visiting Denver Broncos by a score of 19 to 10 during that Thanksgiving Day game.
Starting in 2008, the network eliminated all but one of the Saturday night games and moved their Thursday night package three weeks earlier than before. In the following season, all references to Saturday Night Football were dropped completely from the branding.
That specific contest was instead produced by CBS as an exception to the rule where most NFL Network Special games became Fox productions beginning in 2018. The games continued to have similar productions to games aired under the Thursday Night Football title with only NFL Network branding on graphics.
Amazon Prime Video holds rights to Thursday Night Football beginning in the 2022 NFL season. There will still be a package of exclusive games on NFL Network generally consisting of international games airing at 9:30 a.m. ET.
Rich Eisen took over the position starting in 2022 and continuing through 2025. Greg Gumbel served as play-by-play announcer in 2017 and again in 2021 while Mike Tirico held the role from 2017 through 2019.