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You can only log in once at a time on a download server. If you want to download a lot of files at the same time file faster, use bittorrent :)
Important : This file URL is unique for you, if you want to link to this download, you will have to use: https://www.gamersyde.com/video_uncharted_4_a_thief_s_end_the_making_of_uncharted_4_1-36821_en.html