I am in India and when I search on youtube I find many videos related to India (even if I change the country to "world wide"). Is that because of my ip address? What do I do?

The first step would be to change your location settings, using the 'Location' button, which should be at the bottom of the page, between 'Language' and 'Safety Mode'. There should be a 'Worldwide (All)' option.

It sounds like you may have already tried this though. If it is caused by your ip address, the Google Chrome add-on 'hola.org' is designed to help you access content from other countries, by sending an ip address from that country.

It's available for free here:
https://chrome.google.com/webstore/detail/hola-better-internet/gkojfkhlekighikafcpjkiklfbnlmeio?hl=en

Once it's installed you'll be able to browse Youtube without only having videos from your country suggested to you, just by clicking a button.