It looks like we don't have the translated page you're looking for, but we do have other content in English and offer support in English.
Use video Proofing to add comments at specific times and locations on a video.
Video Proofing works like image/doc/weblinks Proofing:
Attach a video to a task, folder, or project. Click the Attach files icon above the description field and upload a video from your computer or from YouTube. For YouTube videos, you'll just need a video URL.
Click the attachment and begin playing the video.
Click anywhere on the video to add a comment.
To comment on specific points on the video:
Advance frame by frame: Use the arrow buttons under the video to move forward or backward by a single frame.
Jump to a specific point: Click the current time field, enter the time you want to jump to, and press Enter.
Some videos can't be played outside of YouTube. To view such a video, open it in Proofing, right-click the video, and select what you want to do: either open it in a new tab or copy the link to the video.
Use the left and right arrow buttons on your keyboard to move forward or backward by five seconds. Press Shift + arrow to move by 10 seconds.