If you're using a youtube embed, you can just show the video. A lot of people here use embeds and reduce the size to 0px to not show the video, so all you have to do is change the size!
You can also play an audio file, set it on autoplay and show the audio player in your page!
https://www.w3schools.com/TAgs/att_audio_autoplay.asp
This solution works well and looks pretty! (and I think you can add css to it!)
The only problem is that you have to find a place to store the audio files. I don't know many, but maybe Mega could work?