Range source and storage manager for video and other partial content on Android: reads files by offset through HTTP range requests or your own data source, with read-ahead and retries, and keeps what was read on disk or in memory under one size cap.

Transparent video for Android: VP9 or AV1 WebM with alpha on MediaCodec, or in software with alpha-video-vpx and alpha-video-av1, drawn into a TextureView.

Transparent (alpha) animations for Android from ASTC texture arrays in KTX2 files, drawn into a TextureView with OpenGL ES 3.0. The GPU samples the frames as stored, so dozens play at once with little CPU.

Media3 adapter for range-source, the range source and storage manager for video and other partial content: reads through an app's own Media3 DataSource.Factory (OkHttp, Cronet, caches).