For Windows and converting of ID3D11Texture2D textures to OpenGL in GPU is described in https://stackoverflow.com/a/79577300/1468775.

For Linux and VAAPI and VDPAU hw decoders: decoded AVFrame returns VdpVideoSurface or VASurfaceID and you would need to use some dedicated API to transfer data to OpenGL textures.

For Android and mediacodec, there is android/graphics/SurfaceTexture which can use AVMediaCodecBuffer returned from AVFrame.