Hi,
I understand your requirements that you want to add video and audio content in your existing HTML website, and I can do this task exactly as you want.
I am experienced Website developer and I do work on HTML, CSS, JavaScript etc.
I will provide you element as you want, that you would be able to insert anywhere.
I have checked website url also that you provided.
Please send me a message so that we can discuss further.
Thanks,
Swapnil Chouhan