I do not sell any merchandise at the moment but if you're merely looking for a way to support the channel, I do have a Patreon page where you can do just that.
If you have an idea for a video, you can leave a comment on the suggestions megathread found at the top of my subreddit. I get a notification whenever a new comment is posted so there's a good chance I'll see it.
The music I use in my videos is always listed in the end credits, in the description, and/or the credit section on this website. The latter will always be the most complete and up-to-date as I occasionally forget or miscredit stuff. Furthermore, I sometimes score my videos with my own music. This tailor-made background music can be found on my YouTube music channel and on SoundCloud. More information about my music can be found here.
Video Editing: Adobe Premiere Pro.
Motion Graphics: Adobe After Effects.
3D Animation: Cinema 4D.
Audio Recording: Adobe Audition.
Music Production: FL Studio.
Script Writing: Sublime Text.
Microphone: Neumann TLM 103 MT.
Keyboard: Cooler Master SK630.
Mouse: Logitech MX Master 3.
Monitors: 3 x Dell U2715H.
Speakers: Edifier R1280DB.
Headphones: AIAIAI TMA-2 Young Guru Preset.
Camera: Samsung NX1.