Copying portfolio projects from internet in software field

I am working in software development field. To get my job I had to create a portfolio where I show my skills by making different projects. A lot of videos are on youtube where people show such projects. If I copy those videos to make projects will my income be haram. What if I take the idea of project from youtube and develop it myself also taking help from youtube by following the video where project is being created what will be ruling in this case. Although I have learned the things required to develop the projects. People making the videos know that projects can be copied and the company will be paying me for the job I am doing there. They also have an interview to question skills etc.