The only archiving worth saving is his twitch streams but he hasn't really streamed much over the past few months, they come at random times with no schedule, and he makes sure nothing is saved afterwards. If someone could get in the discord, there might be stuff worth archiving there but I think you have to pay to see that and nobody should give that retard money (including his parents and in laws). His tweets won't go away because he is probably more egotistical than he is stupid so he will never think he is wrong on anything so those tweets will remain. Pictures are all you need.
As for context, most are pretty self explanatory. I try and add some context to the pokemon or the community but the politics commentary is just pure retardation so no need to add a bunch of context there
It's good you're keeping up with him, but archiving tweets(if possible) is also good, just for posterity. Good to make it a habit not just for Duncan but just archiving in general, since information can be deleted quite quickly these days.
Like I said Archive.Today tends to be a good site for quick archival
create a copy of a webpage that will always be up
archive.md
There are other mirrors if .md isn't working
Alternatively, ghost archive has been used for Twitter purposes. I've seen a few saved recently so it should work
ghostarchive.org
Lastly, if you're feeling lazy a whole page screenshot can capture the entire comment chain, if it's large enough. There is plenty out there, depending on what browser you use and I know some of them(like Firefox) have one by default.
Either way, keeping archives or even full page screenshots makes it harder for cows to deny evidence(they can easily say you faked screenshots) and if images don't work for whatever reason, links can be a substitute no matter what the state of the site. They also let everyone see the context of his posts by themselves, I've noticed that I can't quite tell why Duncan is talking to somebody or what led to this point sometimes based on your descriptions, seeing an entire comment chain would have helped(especially if the dumbass deletes something out of shame or damage control)
Just my observation from following this thread. I'm glad this dummy finally has one but the quality of it could be a bit higher(compared to dozens of threads I follow on this site). Keep doing what you're doing but see if any of these methods work for you next time you see him posting something interesting.
If you do save any streams, do repost them here even if it's nonsense. It's hard to find anything on him, and with what we know about him, there is a reason why he doesn't save any of them.
Speaking of his content, his actual "job" as a poketuber is a disaster. He barely makes any videos last I checked and it's all bottom of the barrel garbage nobody would watch, I think it's telling that even Rekieta knew more about the franchise than he did. Has his "history" as a pokemon fan/creator been looked into, or is he such a nobody that it was never researched?