There are several… it just depends on which servers your vpn offer.
Generally, any of the countries listed as “no” here would work
I got ads in Albanian!
Every country that I tried labelled “no” gave ads on YouTube.
What really?
Try Russia or ukraine
Don’t know what provider you are using but I’ve regularly used Albania and Armenia with PIA, Nord, and now Windscribe and I’ve rarely had issues.
Every once in a while, it won’t work, but disconnecting and reconnecting usually solves it.