Here is the link of the video https://www.youtube.com/watch?v=C9Y5i77gpwY
And in about 0:07, there is an expression
Rocking the next Gucci ? or Hermes ?
and I can't figure out what words should follow "Gucci" and "Hermes"
The word is "line", it is short for product line which the Investopedia website defines as
A group of related products all marketed under a single brand name that is sold by the same company.
"The next Gucci and Hermes lines" are the absolutely latest collections of clothing and accessories from those fashion houses, by implication so new that they are not generally available.
If you're into that sort of stuff you'll be impressed that the people with those items have both the wealth and connections to obtain them. If you're not into it you won't know, won't notice and won't care.