Hi,

Usually when you apply for a internship, the organisation or the company looks for a substantial amount of knowledge that you have gained in the area of work either through your degree or through earlier work experience or Internship itself. Doing a course from you tube won't help that much cause you don't have nay proof to show what you studied and what you gained. Also your education matters a lot. If you have designs then you can try applying but there might be no guarantee.

I hope this helps.

All the best.