There are no many rules for content in Steem. Normally I would suggest you to upload your video using d.tube, however 1 hour videos are not seen there very often. In dtube, videos are not uploaded to a central server, but to people's computers, which could stream as requested.
I suggest you to upload the video to some other place. YouTube would be fine, many vloggers do it. And then paste the link to a new post from you. Steemit will show it like expected. Just add some text to the post explaining a little bit of the content of the video.
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Cut the video down. If some people dont upload to d.tube as priority then growth will be slim. Just cross post to other platforms.