Still trying to figure out tailscale and looking for a simple solution...

I run a Plex server at my home on a Synology NAS. I've granted remote access to my family, who lives in another country. Everything was working smoothly for about a year. However, their ISP has recently been severely throttling anything that comes from my IP (I have a static IP).

I tested it out by getting them to download files directly from my IP, and it was evident that they were getting atrocious speeds, whereas downloading from any other place would give them phenomenal speeds.

I asked them to try and watch my Plex via a VPN, and it worked just fine. However, the moment they remove the VPN, it goes back to terrible speeds.

Scouring the net I discovered Tailscale and I was reading up about it and wondered if this could be the solution to my problem?

Now the issue is, I don't want to change anything on my family's side... their TV doesn't even support tailscale app.

What can I do at my end so that they can watch things without it coming "directly" from my IP? Its practically like obfuscating my IP just for them.

Thanks much :)