Many youtube users complain about this problem in google forums thread that they are being asked to set the youtube location filter preferences every now and then, they would like to stop the same. Most of them get to see this message when they login with their google youtube account, they see Youtube Suggestions For Location Filter Preferences as shown in the image below.
The exact message is as follows
"Welcome to YouTube! Suggested Location Filter (we have set your preference to this): Spain
The location filter shows you popular videos from the selected country or region on lists like Most Viewed and in search results.To change your location filter, please use the links in the footer at the bottom of the page.Click "OK" to accept this setting, or click "Cancel" to set your location filter to "Worldwide"."
How To Get Rid Of Youtube Suggestions For Location Filter Preferences
Firstly you should know that there is no option in youtube which can help set the location once for all, but this is cookie based notification so this message pop up appears once the cookie expires. Now as many users these days are mostly annoyed by this message as they normally view videos from different location as the default location is worldwide, in case you watch video from a different country then we suggest you change the country under youtube preferences, read here to know more.
But for those who want to watch videos from worldwide location but don’t want to see this notification from youtube, you can try this userscript which lets you stop Youtube Suggestions For Location Filter Preferences warning to pop up again and again. This will take youtube back, force it to search for worldwide contents! This script is Opera – compatible. Also working on Google Chrome with TamperMonkey. If you don’t know how to use this, read the article here. This scripts forces youtube.com to search for worldwide contents, instead of searching videos, channels and activity from your Country only.
Suggested – You should also read this guide by amit aggarwal on how to view the youtube videos blocked in your country.