The sievert unit, in the context of CT scans, does not correspond to the actual radiation dose that the scanned body part absorbs but to another radiation dose of another scenario, the whole body absorbing the other radiation dose and the other radiation dose being of a magnitude, estimated to have the same probability to induce cancer as the CT scan.
1 Sign into YouTube. 2  Click the Upload button at the top of the page. 3  Before you start uploading the video you can chose the video privacy settings. 4  Select the video you'd like to upload from your computer. 5  You can also record a video from your webcam, create a video slideshow or import a video from Google+.
When upload video to YouTube, it's necessary to check ahead if your video size matches with the requirements of YouTube video uploading. 1. File size for YouTube According to the rule, video file size is limited to 2GB for YouTube uploading. But size larger than 20GB is allowed by using an up-to-date browser.