You will get leagues better picture quality using a camlink/capture card and a camera with clean HDMI out. A gopro is a good budget option but a used DLSR or mirrorless camera is going to be the best. Some DSLR and mirrorless cameras support video out over usb so you don’t even need a capture card. Here’s a guide on getting it to work on Linux with a camera capability list inside the guide. If you do want to go the capture card route I hear elgato’s camlink works in Linux.
As much as I hate to say this, MDMA being used for treatment of mental illnesses might not be viable option because of it’s negative effects. I do not know if short term severe depression and long term memory loss is worth a reduction in PTSD. Maybe as a last resort medication similar to how methamphetamine is prescribed for drug resistant ADHD.