The developer's ghost to beat isn't the Dev26485 whatever on the leaderboards. It is a default purple ghost that you race the first time you do any Spirit Trial during the campaign. Simply beat this ghost on all 8 trials for this one.
Of note: the game disables all of your shards except Sticky when you start a race. You used to be able to pause and re equip shards but per user report below that has been disabled. Dash is crucial, knowing WHEN to dash. A video is not necessary for this one as you have the ghosts to race. However, I have included race activation points (finish lines) in the collectibles video.