new to D.tube! and first video

as you might have noticed (or maybe not LOL) I have posted my first video to D.tube, and hopefully much more will be coming, but!!

I have a question, I hope someone can answer and I will go google around and see if I can find an answer too, and reply if I do find something. anyway the question being, I have a page that says "keep this page open to seed your video" on d.tube, so I am wondering, do I HAVE to keep that open to have the video available? or is it going to be ok just being dumped on the net, the way youtube and dailymotion and others work? I know there are some serious differences between the steemit platform so I just wondered.