So whats the best way to get all the lore of the game in one place?

Well, the Dead by Daylight wiki here: https://deadbydaylight.fandom.com/wiki/Dead_by_Daylight_Wiki

While it obviously has a major focus on gameplay too, this is where I'd recommend one starts especially if you want to research specific characters like the Killers or Survivors, or specific features like "hmm, why does the Hatch exist?". On their respective pages, it lists all their bios and includes a link to their Tome content, if it exists for them. You can also check the Tomes on the wiki too, to read them in their totality without having to unlock all the entries by playing the game.

Aside from that, and because you requested a video, Pixel Bush Entertainment is currently a DbD-focused lore channel on the rise. And, conveniently, he's already made a video going over the fundamentals, so even someone who's never played Dead by Daylight can understand what's going on.

The only real issue with his channel for the time being is that because he's so relatively new, he does not have videos on everything, so there will be holes. He's also an analysis channel, not a "I'll just read the bios for you" channel, just so you know what you're getting into.

A bit late, but I personally would suggest the dbd lore dive series on YouTube, it's runed by a channel called spoiled fruit production. He has covered pretty much every killer, survivor, and even some other things like maps and legendary skins.