There are lots of mobile screen recorders on play store and out of them I liked Xrecorder mostly. There are lots of options to choose from while recording your screen. You can choose screen resolution form 1080p to 480p. You can choose fps , screen frequency etc. Most of the time I choose 480p because it tooks too much of storage and 480p looks ok for mobile gaming but if you want high quality videos then you can choose maximum settings. You can pause the video and then start again. The best feature of this app is that you can record yourself and gameplay at the same time which makes gaming content creation so easy. You can even take screenshots while gaming which is another cool feature. Another best feature is you can record only external sound or both of them depending on your choice and there's noise reduction function to record external voice clearly.
Screenshot Source: Google Play Store