I am a frequent user of Day One and recently subscribed to be a premium member. However, a friend of mine took up journaling and recommended an app called Journey.
I looked through it and it seems to have almost the same basic features of Day One, in addition to the video feature I was wanted as well
Day One has hooks into weather, social media feeds, can use calendar events as entries, and recently added audio. It’s a more comprehensive option, but if you don’t want or need that flexibility then other apps might be perfectly fine. (Before I moved to Day One I used the iOS-only Momento app.)
I played with Journey, it seems good. Zapier wrote - as they often do on many subjects - a great overview of journaling apps. Worth a read. They call Journey the best alternative to Day One, with one-time payment being a plus. (One nice Mac/web/iOS app not mentioned in the review is Diarly.)
I played with Journey for a time, it is also part of Set App. Liked the interface of Day One better, plus you couldn’t do multiple journals on Journey, which I really need.