Where I was or where I were? [closed]

This question came up to me when I was watching this interview video : https://youtu.be/5sNWXJnKYxc?t=251

Left: "Dan knows where I was. Where ... where I was? Where I were?"

Why did he switch to use "where I where" instead of "where I was"?

Edit: I know that in that sentence, he should've used "where I was". I'm simply confused on why a native speaker would say "where I were".

The correct conjugation of "to be" in first person singular, past tense, is "I was". Therefore, "Where I was" is correct and "Where I were" is incorrect.

The confusion may arise from the present tense of regular English verbs taking on a similar form to the plural persons (which is "were" in the case of "to be"). For example, for the regular verb "to look", we have all of the plural forms (we, you, they) as well as the first-person singular (I) taking on the form "look" and the third-person plural forms (he, she, it) taking on the form "looks".

For information regarding why present-tense conjugation of verbs in the first-person singular is similar to the plural persons, see Grammar Girl's "Why does 'I' Take Plural Verbs?"

Conjugation of "to be": Wiktionary, Reverso