If you aren't currently logged into your Outlook account, do so with your Outlook email address and password. It's in the top left corner of your Outlook window.  You can also click Upload at the top of this screen, select Files, and select your video from there.  Your video should begin uploading immediately, but it may take a long time to complete this process. You'll need to keep the OneDrive page open until your file's upload completes. Now you're ready to send your email. It's at the top of the page, directly above the "Inbox" heading. You'll find this next to a paperclip icon above your new email section on the left side of your screen. This should be at the top of the page.   Unless your file is less than 20 gigabytes in size, this will be the only available option. These will include your recipient's email address, a subject field, and email text. Your video file will be shared in the form of a link. Once your recipient opens the file by clicking the link, they will have the option to download the file. Unlike with Gmail, files sent with OneDrive are automatically assumed to be shared with your recipient.

How would you rephrase that briefly using Chinese?
打开Outlook网站。 点击3x3的圆点图标。 选择OneDrive.  点击视频文件，并将它们拖到OneDrive窗口中。 当视频文件完成上传后，退出OneDrive标签页。 点击+新建。 点击 附件。 选择OneDrive。 选择视频文件。 点击 下一步。 选择 附加为OneDrive文件。 输入邮件的具体内容，包括收件人的邮箱、邮件主题和邮件正文。 点击发送。