Bloodborne Platinum Trophy Guide (episode 37): all three endings, Gehrman boss battle, Moon Presence boss battle.
00:40 - Gehrman boss battle
05:35 - Old Hunter Badge (allows to purchase Burial Blade at the Messenger shop)
05:40 - Honouring Wishes ending
07:50 - Yharnam Sunrise ending
13:30 - Moon Presence boss battle
16:00 - Childhood's Beginning ending
In order to get all 3 trophies without doing 3 playthroughs make sure you upload your system storage data to PlayStation Plus via Application Saved Data Management in Settings prior to beating the boss for the first time. Once you get a trophy for doing the first ending, just re-download your save from Online Storage. Also, make sure that the automatic save to PlayStation Plus is not marked in your settings.