Development/Quality Assurance Testing
GameTrailers (GT)'s web site has a collection of videos on various video and computer games. There are histories, facts, etc.
Gaming History Source's YouTube video channel has a ton of "Let's Compare" on old video games on various (system/port/platform)s. It already has video playlists for each year
MicSauce's Reddit comment mentioned an old Wired article showing "Interstellar 8-Track: How Voyager's Vintage Tech Keeps Running ... Launched in 1977, the probe is vintage space hardware. At more than 36 years old, or roughly a millennium in computer years, it's an impressive feat to have the spacecraft drifting through the material between stars. Looking at the machine's specs is a reminder of how far electronics have come in the intervening years..."
Vintage Computing and Gaming shared Jason Scott's blog titled 5/"Five Unemulated Computer Experiences" -- "While I and many others work to turn the experience of emulation into one as smooth and ubiquitous as possible, inevitably the corners and back alleys of discussions about this process present people claiming that there are unemulated aspects and therefore the entire project is domed.
Idoiocracy's Reddit re(ply/sponse) mentioned his The Making of Games' alphabetical index of all submissions with many links including videos.
TechHive shared a fifteen/15 pages screen capture/shot gallery showing "Relive the 1990s with these ancient, still-functioning websites ... The 1990s were also when most of the public first encountered all the digital magic the 'World Wide Web' (WWW) had to offer. The Internet has been through a lot in the subsequent decades, but you can still visit a number of stubborn vestiges of these primordial days.
MarphitimusBlackimus/Marphy Black/Revenant100's YouTube channel has a playlist, with currently 24 videos and 2.5 hours, showing "Half-Life Fact Files -- Do you want to learn more about Half-Life? To see the obscure? To witness the oddities? Then, you've come to the right playlist!