Music

The simplest way of exploiting your learners passion for music is to ask them to share their favourite music videos. Then they can do a range of things with those favs.

They can easily find the lyrics and turn them into cloze-tests with the help of a cloze-maker http://l.georges.online.fr/tools/cloze.html

They can use the images of a video. They stop the video at a point, they note the time but keep it in secret. They describe the scene in a comment and the others have to find the given scene in the video and write the time point in a comment.

They may simply lip-sync the video like this:

You can just take phrases or words from the songs they submitted and play a quiz to find out which song it was from. Write a collaborative stories/letters using the phrases, words.

Everyday situation role plays

It is quite trivial, simple, handy but highly Facebook friendly: get your students video record everyday roleplays.
You can use your coursebook situations as models that are  just to be copied by students or they can write their own scripts. Knowing that the video will be uploaded on Facebook they will surely pay more attention and practice more. You can follow the steps of a usual video project.

Santa digital storytelling

Ask your students to go on http://www.faceinhole.com/ and create a Santa scenario with their faces uploaded like this: 

Then they are to write a story about how they suddenly became Santas under the post in a comment.

The mini-project requires them to register on the site (Facebook registration is also available although it wasn't able to find my Facebook albums when I wanted to use  an image from there.) 

Finding their ways on the site will force them to read in English and the outcome is a short piece of writing in Past Simple, Past continuous, etc.) 

It is a little bit of creative writing, they will definitely inspire each other.

The site itself offers somewhat inappropriate content here and there so look out for that.

Your precious comments are more than welcome :D

http://www.faceinhole.com/us/my-faceinhole-detail/id=28497dbcc1111361b9

Video grammar

In this activity I used a video which is a meme in my country. It is a re-dubbed version of a cartoonized folk tale. Although it contains strong language at places I would use it for its popularity. 
Learners are to watch the video and write sentences with two PAST CONTINUOUS structures, also provide tha point of the video when the scene appears. 
E.g. 3:05-3:08 While József was cooking the bauxite soup, Babi néni was licking her lips.
It also occurred to me that students might try and explain in English why the video is so popular in Hungary, I find it a very authentic task (mediation). They can do it collaboratively in comments. These comment threads provide basis for editing a piece of writing, comments can  be linked with a focus on cohesion and coherence.
Group members may find similar videos for the same purpose according to their own preferences.

http://youtu.be/RXg-2Us3NRY

Retell a video

This activity improves listening and speaking, involves taking notes.
Post a video on the group wall. Ask your students to take notes to retell the contents of the video in the lesson.
The example is a recipe. Encourage students to find similar videos and list them in the comments section.
Turn it into a writing task, they may create docs in the Facebook group with recipes.
Optionally they can shoot their own cooking video, bring the dish they made to school  and have a classroom dinner party :D

http://www.howcast.com/videos/87636-How-To-Make-Fruit-Salad

http://www.youtube.com/watch?v=0IoXWZlQVzI

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Video remake

The end products of this speaking project are videos, which might easily be displayed on a Facebook group wall.

This activity is the simplest ever video project. Ask your students to watch the video, form pairs, choose one scene from the video and simply learn the chosen scene and record themselves performing the same dialogue with the help of a mobile phone and upload on the group wall.

You might want to do the same procedure with other videos, learners may take their own choice of videos to remake.

A variation is to remake the video with some changes, different ending, etc.

Probably you can clarify the concept of film remake, enumerate some remakes.

http://www.youtube.com/watch?v=uyZw0Zy-HS8&feature=share