There are a quite a few German teachers on YouTube that offer a surprising amount of free content.
-Learn German with Anja
-Lingoni German (formerly "German with Jenny")
-Deutsch für Euch (with Katja)
-Learn German with Herr Antrim
-LanguageSheep
Below I've linked a few playlists.
Light IntroductionHere is a playlist from Anja covering a lot of basic phrases and topics.
https://www.youtube.com/watch?v=MOtqMNK ... W7pkwUMHXyPronunciationSeries from Anja
https://www.youtube.com/watch?v=s-e4cXg ... e6nTKLVL_KSeries from Katja
https://www.youtube.com/watch?v=4DnNVi1 ... QVa2sN7jJ6Series from Language Sheep
https://www.youtube.com/watch?v=BOCoGEy ... 873EEE18F4GrammarHere is a long video from a newer channel called "German with Laura" that gives a broad overview of German grammar. (Laura seems to be trying to direct viewers to her paid website/course so there is only a limited amount of free content on the channel.)
https://www.youtube.com/watch?v=paDNTjoWExIIn a similar vein, this one-off series, ambitiously title "Secret of the German Language," gives some tips for keeping the genders and declensions straight.
https://www.youtube.com/watch?v=_xL6XD48jMkA lengthy general grammar series from Deutsch für Euch
https://www.youtube.com/watch?v=dNA3YSR ... Rbekvfx7pxA series from Anja on cases
https://www.youtube.com/watch?v=8VowGvn ... LeUw5g80THA series from Anja on various grammar topics (verbs, etc)
https://www.youtube.com/watch?v=uTtzEyK ... B55f7TZub6Four long videos from Herr Antrim (Present Tense, Accusative, Dative, Genitive)
https://www.youtube.com/watch?v=GRYulP5 ... QW8rmvfnRUComprehensiveJenny's playlists are graded by level. Below is the A1 playlist.
https://www.youtube.com/watch?v=gz9JbZc ... 9TfEklY4sg