The internet is full of people who know very little about English but are claiming to be experts. The fact that this YouTuber used the term 'old English' is evidence of their ignorance. They obviously don't know that 'old English' is the language of the Anglo-Saxons, spoken between the 5th and 11th centuries. It is also virtually incomprehensible to anyone alive today. I'm guessing that this ill-informed influencer meant that 'ought to' is outdated. Is that true? No, it isn't. We all use 'ought to' in our daily lives - often pronounced 'oughta', as some other members have pointed out. Is it the same as 'should'? No, not always. It suggests a stronger obligation that 'should'. Don't believe everything you see on YouTube!

I wouldn't call it "olde English," but it's not used very much. Most people say "should." You will occasionally see it in books or hear it in conversation.

Thank you all! Your answers really helped me to understand it, especially Giancarlo's answer. Thank you so much for taking the time to write such a clear explanation!

Maybe "ought to" is used less frequently, but as a Canadian English native speaker it's news to me that it's supposed to be old English. Like Giancarlo said, you'd often say it something like "odda" in North American speech, or "awta uv" for "ought to have". It's hard to explain, but personally I feel like "ought to" is stronger than "should".

Hello! I am American as well as the other person commenting. I don’t mean to confuse you with contradictions, but I have heard this many times. In fact, my family and I use this very often. To start “Ought to” is in fact a word in the English language and is proper. It is a modal verb almost always followed by “to”. As the other person said, you should use “should” instead as it is more common now. But something interesting about “ought to” is that it is more commonly said fast here in the New York/New Jersey region and transformed into our speaking as “ought ta” (it sounds like awe-tuh). This “oughtta” is heavy slang but is used by many people here. An example with the proper “ought to” would be: -They ought to be done by now! This is a very common phrase in English. Remember that saying “oughtta” is slang and not proper English that is said commonly. Rather we can see that “Ought to” is proper and can be used but is uncommon to say phonetically and fully in a sentence. Hence why we get the jumbled slang “oughtta”. But this is the fun part of language! Learning to bend and break the rules which often helps us learn within the constrictions of language. It’s fun! Keep up the good work! Very good question! Best, -Giancarlo