…By the way, I want to point out that there are some forms of ballet that don’t tell a cohesive story, but the large majority performed are narrative ballets. Now let’s talk about some characteristics of ballet. First of all they are typically pretty high budget performances. Moreover, They have large, elaborate sets, full costumes
Please explain the paragraph above for me.

“cohesive story” = story that makes sense as a whole (rather than being just a series of unconnected images or impressions, for example)

“high budget performances” = performances that cost a lot of money to stage

“full costumes” = all the dancers are wearing costumes, and these are probably quite fancy or elaborate