- In order to provide paid video, it was necessary to prevent the client from recording the video. I also had to prevent the client from saving the video. To gain high level of security in network, client and server, I chose to use 3rd party video hosting server. I judged it would be difficult to make all the functions by myself.
- Most Open source text editors are made in English. Therefore, there were many unpredicted problems when using Korean. I learned about the problems and difficulties that arise when creating a rich text editor. I tested about 5 famous rich text editors and used CKEditor because it had the least errors in Korean.