With only a few cheap pieces of gear, you can shoot great sounding videos in your car! See the list below for more details.
Here is a list of gear mentioned in the video and where I purchased it.
Note: Some of these links have an affiliate code, if you purchase with these link you will be supporting me and these videos at no extra cost. Thank you!
A Style Spring Clamp on Amazon $5 (pack of 4)
You can alternatively get these clamps at Home Depot for $0.99 each if you have one near you.