There are some large public banners for Gridcoin on the Gridcoin Marketing GitHub:
https://github.com/gridcoin-community/Gridcoin-Marketing/tree/master/Gridcoin%20Logos/PNG%20Format/Horizontal
You can look at the other logo items there as well:
https://github.com/gridcoin-community/Gridcoin-Marketing/tree/master/Gridcoin%20Logos
Also, for screen and audio recording, I would recommend OBS. It's free and can do practically every task, however, the user interface isn't very friendly. Once you get used to it, OBS is amazing.
https://obsproject.com/
RE: Gridcoin Denmark channel is created