I use Vivaldi. I've been getting the ads mostly. I have to open YouTube in a private window and view from there. Do you have Unblock with scripts? My scripts only worked for awhile. The built in adblocking is just not working for me.
It's just a regular install with "block trackers and ads" enabled. The only YouTube related plugins/extensions I have are tube buddy and dearrow to remove clickbait thumbnails. I don't use unlock, ad block, or anything like that.