Re-Player Wave: Lesson Learnt from YouTube RealTime

I have been doing the YouTube related projects since late 2008. As a YouTube user (and fan), I find that watching videos together with friends or family is a very unique experience also because normally we only watch YouTube on our own laptop or computer.

In the early 2010, when I was doing the first assignment for CS4341 Multimedia Technologies in NUS, I found an interesting feature provided by YouTube. It was called YouTube RealTime. In YouTube itself, it allowed user-to-user interaction, an element which is getting more and more important due to the rise of social networking sites.

In YouTube RealTime, people are able to see what their friends are doing on YouTube, for example the videos they are watching, their comments for the videos and so on. They can also receive real-time notifications when their friends add a new comment to the video. So, it is something like Facebook where the users can see their friends’ status as well as receive real-time notification when their friends like or comment on their posts.

YouTube RealTime Toolbar Showing Friend Activities

YouTube RealTime Toolbar Showing Friend Activities

However, just about one month after the school assignment was done, YouTube RealTime was discontinued by Google in March (Reference: About the same time, I attended a Google Wave workshop for CS3216 students. So, I was thinking whether I could do something similar to YouTube RealTime which would allow me to share and watch videos together with friends staying in different places. On 6 February, a new project Re-Player Wave began.

Google Wave
Google Wave is a software application originally developed by Google and later continued by Apache as its Incubator program on 6 December. Google Wave is mainly for real-time communication and collaboration. It was a cool toy for the web developers as well because they could write a gadget for Google Wave. Building a Wave gadget is not that difficult because it requires simple JavaScript, HTML and XML knowledge only.

Luckily, Google Wave does not meet the same fate as YouTube RealTime which is discontinued by Google. Hence, I was still working on the project of building Re-Player Wave, which is also a Wave gadget, in the past few days.

Real-time Videos Sharing and Communication
Google Wave provides a very interesting feature which is online real-time collaborative editing. The main reason why I choose Google Wave as the platform is also because of this feature. Re-Player Wave allows user to share videos with a selected group of his friends on Wave. For each time he adds a new video to Re-Player Wave, the group of friends will be updated at the same time as well.

In order to prove that Re-Player Wave is able to do that, I borrow my sister’s Wave account to do the experiment. If I add a video on my computer, then my sister’s Wave thread will be updated with the new video which is added by me. Similarly, if I add a video on her computer, then I can see the update in my computer as well. The new video will only be added to the list but will not replace the current viewing video.

Re-Player Wave: Sharing Playlist with Friends

Re-Player Wave: Sharing Playlist with Friends

YouTube RealTime also provided the feature for real-time communication. Thanks to the same feature offered by Google Wave, real-time communication will thus be possible in Re-Player Wave as well. Besides, there is no need to find a place to host my YouTube Re-Player because all the key information can be stored easily in the state of each Wave thread. After trying to find a place to host my YouTube Re-Player, I finally find a solution to this problem by just transforming YouTube Re-Player to be a Wave gadget.

I learnt about the JSON in my previous GCL Project. In this project, I came to know about the JSON-C. According to the YouTube API Developer Guide, the developers are encouraged to use the JSON-C, instead of JSON, for their applications because the JSON feed will be eventually be replaced by the new functionality provided by JSON-C.

According to the guide (, JSON-C feeds are something like the simplified version of JSON because all those XML namespaces and schema related information will not be kept in JSON-C. So, JSON-C is easier to be parsed and used. I am currently finding ways to improve Google Docs Notifier from my another GCL Project. Google Docs Notifier retrieves all the information stored in the JSON format, not in the JSON-C format. So, it is sometimes very hard for me to find out where I should get a certain information out from the JSON.

YouTube Social

YouTube Social

Another Alternative: YouTube Social
Actually besides YouTube RealTime, there is another application called YouTube Social which does almost the same thing as YouTube RealTime and Re-Player Wave. One interesting feature of YouTube Social is the remote control. Unlike Re-Player Wave which the user cannot control what his or her friends are watching, YouTube Social gives the owner a remote control so that he can control the YouTube player of his or her friends as well. If you find this feature useful, you can try it out at

Re-Player Wave

Re-Player Wave

What’s In It For The Users?
To summarize, Re-Player Wave is a new way for YouTube users to interact with their friends in real time. With Re-Player Wave, you can:

  1. Share videos with friends;
  2. Invite your friends to watch the video you are watching;
  3. Chat with friends about the videos in real time.

Now the Wave has come back from the dead, so please join the Wave community again. If you want to try out the gadget, you can download it at: (available until 31 December 2011).


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