Getting to grease zerk

Thanks all. I just watched the video we did on the walk through. He said just pop the cap off and the zerk will be there. Confusing to me was he said just two to three squirts of grease. He went on to say these are the ezlube bearings, he also said they were sealed. Now I thought the ezlubes where not considered sealed bearings? What am I not getting after watching the vid. Is it a universal grease that goes in these. Mostly I just want to inspect the grease. I did call and confirm I had a zerk after trying to get the cap off.