Limit background processes in Developer Options to dedicate all CPU power to your video player.
NewPipe is a lightweight, open-source YouTube client that does not require Google Play Services. While the mainstream NewPipe branch has moved on to higher Android versions, independent developers maintain "Legacy" or "Extended" forks specifically compiled for Android 5.0 and below. NewPipe offers: Ad-blocking capabilities by default. Background audio playback. Direct video and audio downloading options. No requirement for a Google account login. 2. SkyTube / SkyTube Extra youtube android 5 version full