The period in which Smartchess was active [late 1990s to mid-2000s] was a controversial time for the World Championship and its association with Karpov might provide valuable background material. I'll try to look at its Wayback records another time.
That led to a follow-up on my main blog, Wayback to Smartchess (November 2022):-
In his interview with Smartchess, Karpov mentioned a couple of video series he was developing for Smartchess's 'WWW Chess Superstore'. I've featured two of these in posts on my main blog [see links; ...] How many more of these videos are still available on Youtube?
The answer to that last question is 'More than I expected', all on Youtube channel iChess.net. Here's one.
Karpov on Kasparov - 1984 World Chess Championship (18:17) '[Published on] Jun 30, 2012'
The description said,
Who better to analyse Garry Kasparov's World Championship games than his opponent and eternal rival, Anatoly Karpov? Get instant access to Karpov's astounding analysis of his matches against Kasparov. [...]
Right-click the embedded video to find the original page and see the rest of the description. It points to a page titled Karpov on Kasparov - His World Chess Championships (1984-1990) (ichess.net). The description there said,
Overview: Karpov On Kasparov – His World Chess Championships (1984-1990) 3-disc set converted, reauthored, and remastered by OnlineChessLessons.net. Total Run-time: 275 minutes. Volume I - 1984/1985 [KK-1]; Volume II - 1987; Volume III - 1990
So the 1985 and 1986 matches [KK-2 & -3] are missing? I imagine the memories for Karpov were too painful after he surrendered his World Champion title in both.
There are more video series by Karpov available from Youtube and iChess.net. It's also worth noting a post from last year, Carlsen's TMER 2019-21, Chess24 (November 2021), where I wrote,
Current information about [the company 'Play Magnus'] is available from its web site. The following image from the site's main page lists eight subsidiaries: [...] and iChess.net.
Will I find the occasion to overview the other Karpov videos? Maybe, but I might have to bounce back to my main blog to do that.