Demo for video PreLoading/ PreCaching using ExoPlayer 2.13.3 in Android.
With this project we used some dome videos URL's and Adnroid intent service to preload/precache those videos in background. If a video is found cached the player will use local cache to play those videos otherwise will load it from server.
Article link (Obsolete): https://medium.com/@ibaljeet/video-preloading-precaching-using-exoplayer2-in-android-da340cc268d9