I think the solution there is to get a streaming stick or a streaming set top box that supports VP9 to plug into the TV. Or alternatively a small form factor PC like a Zotac mini pc, or palmtop if it's strong enough:

https://www.zotac.com/product/mini_pcs/zbox_p_series

Intel's Compute Card is aimed at giving you a way to upgrade the computing side of devices like TVs without having to buy a new TV:

https://arstechnica.com/gadgets/2017/01/intels-compute-card-...