We use FindTime a lot and when using RingCentral Video links with FindTime we run into a bunch of problems.
I opened a ticket with support (12440948) and they suggested a feature request.
I was not able to click the meeting invite to start the RCV meeting. I had to manually copy and paste the link into my Google Chrome Browser for it to work. What is also odd is that when I did that and put it into Chrome, it added a semi-colon which made the link invalid. Once I removed the semi-colon, it worked perfectly.