Watrermark In Video as the upload to youtube,dailymotion and other sites ?

Hello,
i have seen alot of website,who upload tv serials in my language to youtube and dailymotion and other sites the thing is that,they have the same video and with Watermarks on them,there website logo or discription and the upload as fast as possible (about 5-10 minutes after the tv serial has an advertisment)so basically as the tv is showing afvertisment they have their video(s) ready (some maybe proccessing) but all with their watermark my question is how do the put watermark on their video so fast and be able to upload videos to youtube,dailymotion and other host at the same time ? is thier any FFMPEG involved on their own server where the video,the upload and go to the hosts or they put logo very fast with something ?? i have FFMPEG on my server and im able to upload videos to my server with the logo but how can i do that with youtube ? that the logo is on the video and fast ?
example post

http://www.dramasonline.com/dil-e-muztar-last-episode-in-high-quality-27th-july-2013/

take a look at dailymotion part

and here you can see the same with youtube as well

http://www.friendskorner.com/forum/f265/hasb-e-haal-dunya-news-2nd-august-2013-a-325726/

Please let me know thanks!