Are you actually old enough to consider that within the next year or so you are going to die?
I mean, sorry if I am being insensitive here, but unless you have a terminal illness and 6 months to live, I don't see why this needs to be a thing.
Yeah, shit can happen at any time, but really? I doubt this forum will even be here in 10 years time (No offense, but I think few people do too)
I guess it is nice to have everything taken care of, but I still think this is a bit strange.
Anyways to answer the questions, since the list is significant enough on this forum, maybe ask Dave or another mod/admin to give the list to another person after 6-12 months of inactivity on your part? I mean you could also just do what sokoloff said and have people contact someone here in event of death.
Also another note, maybe you should add Jamie Mantzel to the list? He's not primarily an electronics channel, but neither is Khan Academy (At least I don't think so). Even still he is an AWESOME YouTuber and people should check him out. His philosophical views are a bit stupid, but he's a guy, living on an island in Panama, building stuff. It's as cool as it gets. He even spent years building a giant robot out of scrap aluminium.