You can find all of the episodes on YouTube, but there is a much better way to watch にほんごできます. Go to https://www.erin.ne.jp/jp/. This is their official site which has all the episodes for free and it also has some other features.
The great thing about using their official site is that all of their videos have a separate text box beneath them which allow you to enable 4 kinds of subtitles: Japanese (with kanji), Japanese (no kanji, only hiragana/katakana), Romaji, and English. That's not all though, you can mix and match subtitles or run them all at the same time! Just don't use the English subtitles! If you stumble upon a word you are unfamiliar with, pause the video and look up the word using an online dictionary. This is a good way to expand your vocabulary.
*My lang-8 friend Yumi kindly directed me to https://www.erin.ne.jp/jp/ so thank you Yumi!
*Check out my post on Lang-8 HERE