Best souls game, if not best game ever (coming from a 40 year-old gamer). And it still looks good to this day. And I admire how ppl still look for (and find!) new ways not to face the Capra Demon :)
If you go down to the hidden path below and climb the ladder up the rampart, over the edge directly ahead of you, you can see directly below into the capra demon boss area.
By the time you fight him in all bosses, you literally one shot him... which is faster. There's zero reason to do this in any speedrun, as even for souls you can just dupe and it's quicker. Neat trick, though!