I think if you don't finish quest from previous day, you can do twice, like the quest from yesterday and today.
Presuming you have already done the Water of Life HP quests, you can still get around 754 more HP from the unlimited Elixir of Life quest, otherwise 254 (going by stats from the beginning of the video). We haven't changed anything within the calculation in the patch.
It actually switches over from being limitless to becoming once-per-day when my base HP exceeds 10,550. I wonder what's the calculation behind this.
This is to ensure that characters who already passed level 175 are not put at a disadvantage, as kindly pointed out by user Aelyssia here: https://royals.ms/forum/threads/feedback-thread-a-new-way-to-gain-hp.190296/page-3#post-1120660 The logic was adjusted accordingly in the following patch.