The video is very brief. Just talks about his beliefs in slavery and the equality of men.
How true are the contents in the video?
It will be great if you post the points of the video here, so that they can be discussed, rather than asking everybody to watch that video.
In addition, we have great FAQs that discuss this topic, that we invite you to review:
And finally, the results of a search on "Lincoln slavery", which is often asked here.
Hope all that helps!