x.comx.comhunyuan.tencent.com腾讯混元hunyuanvideo-avatar.github.ioHunyuanVideo-Avatar: High-Fidelity Audio-Driven Human Animation for Multiple Charactersgithub.comGitHub - Tencent-Hunyuan/HunyuanVideo-Avatararxiv.orghttps://arxiv.org/pdf/2505.20156