Yes, you can limit the website you own to a certain number of youtube videos.
The current video length limit is 15 minutes Only YouTube partners can exceed that limit
If you comment on a video it gives you 500 characters, so yes there is a limit.
There is no limit to the amount of videos that a user can upload to YouTube. There is a limit of fifteen minutes for each video, but this limit may be lifted on application to the site, and there is no payment required for this.
ive never seen a movie longer than 15 min
There is no official YouTube feature that does that at this point of time. However, if you're a YouTube partner, you can upload a video onto YouTube and make it release to the public at a set time and date. So you can upload 10 YouTube videos on one day and release each video periodically over the span of a year by using YouTube's schedueled release tool.
Various versions of the song "No Limit" can be found on YouTube, including versions with lyrics, featuring video posters, and the official video. One can also find videos on Daily Motion and last.fm.
The 10 minute limit YouTube places on its users is because before this limit was in place, users were able to upload unauthorised content - such as whole movies - which went against the sites terms and conditions. However, it is possible to upload longer videos if you are a YouTube partner.
No you don't.
No, it still belongs to you and you can delete it or add annotations to it at any time.
As Youtube's reason to exist is to host and distribute video clips, this would appear to be a very unlikely course of action at any time.
There are varieties of YouTube videos like this @Kinhaspace