how can i Загрузить a video on youtube?

It's quiet simple:

1)press the "Upload" button on the вверх of YT's home, Далее to the browse button
2)then when the Загрузить page appear, wait until the "Upload Video" button to reveal and Ты click it
3)after that, choose a video file Ты wanna Загрузить from your computer then wait till the uploading is finish
4)while waiting, Ты can Редактировать the video detail (right below the uploading progress) by change your video's name, description, tags, your video's privacy and the category
5)when it finish, click save to save your detail within the video file you've upload
6)if Ты want to change its thumbnail или etc just go to "My Video" on your account's option and click on Редактировать and thus...

hope this help you, I'd like to help anyway ^^