I used to use RiF back in the day when it was still a buggy mess. I don’t even remember when I moved to the native app. I don’t agree with Reddit’s policy update (why I’m here) but I thought the default app was fine for normal browsing. I never had issues with the video player or anything else.
I use Samsung Galaxy devices if that’s relevant.
I too used the native app on Android (mostly bc I was a quite recend user, and initially I did not know about all the 3rd apps stuff). It was quite buggy (video player worked only half of the times, it was impossible to open external links on my browser, it forced me to open them in-app), but the main reason I’m here is for ideological reasons (like OP)