Since Japanese does not have articles (like "a" or "the") this same sentence pattern can be used to say many things that would be said differently in English. There are actually multiple ways to introduce yourself in Japanese. For example:
Watashi wa ___ desu. Watashi wa ___ to iimasu. Watashi wa ___ to mōshimasu.
You can check the video review notes to learn more about these expressions and similar expressions. To see the notes, click the link in the description (◕ω◕)♪