The first video is about summaries. Summaries have to be shorter than what you are summarizing. Use facts to help write what you are summarizing. Use your own words without quoting. Be neutral when summarizing, don't favor one point over the other.
The second video talks about the number of keywords you should use when using your libraries database. A good amount is 2 to 4 keywords.
The third video talks about the importance of citations. Citations make your writing more credible. Insufficiently citing your sources can result in failing your paper or expelled from the university.