JapanesePod101 usually teaches mostly vocabulary, grammar, and how to write hiragana, katakana, and kanji. They have a YouTube channel with many videos to teach you but, their website has way more features. It is free to sign up but, I don't know if all the features on the site is free if I remember clearly. I am also a user of JapanesePod101 myself. Here is a sample video of how they teach the vocabulary on YouTube:
I recommend this if you are trying to increase your vocabulary.
And here is one of their latest videos on YouTube and it last around 14 minutes and it's more of a lesson than simple vocabulary:
I wouldn't really highly recommend it but, on a scale I see it as average. But, that is just my opinion! ^_^ But, I recommend it for light learning! ^_^
I will try to find more resources for studying and learning Japanese!!! GANBATTE KUDASAI!!!