A lot of websites do not allow you to view their content if you have a ad blocker enabled in your browser.
You can edit your videos very easily in youtube. To start log into your youtube account, select the video you want to edit then click the enhancements button.
You can now rotate the videos either left or right. Sometimes the videos that you have shot(perhaps using your phone) are very shaky. In this case, youtube can also stabilize the videos for you. In this case, click the stabilize button and click the save button.