Скоро будет программа и на русском языке.

Здравствуйте, всё просто, кликаете на иконку Youtube, затем в поле вставляете ссылку или вводите слова для поиска видео.

Hello, the program is in the taskbar.

Hello, please, send us more details regarding the problem.

Hello, are you dragging the link?
For the better understanding it'll be great to see a screenshot with the error.

Hi, you can add a video by clicking on the "Drag and drop Here" button.

Hello, through your google account.

Hello, click in the program on "Drag and drop Here".

Create a folder in the program may be done in the future.

Hello, thanks for contacting, we will try to figure out what the problem is and fix it.