I personally had the opposite experience when it came to highly collaborative SMALL teams. In my last WFH project, lasting a couple of years, we worked 8 hours a day in a video call with our cameras turned on (most of the time). We did code collaboration in VSCode, design collaboration in Figma, and database/architectural collaboration in Miro. Everything else was via screen share. For our team it was HIGHLY effective. It didn't hurt that we all enjoyed working with each other. The choice to work in video calls with our cameras on was less about accountability and more about feeling connected. Nobody judged if your camera was off or you left the call. Easily the best years of my career.