Hi Hubert!
Yes, I agree with you. I don't think I have time ou experience to develop something from the scratch. I do believe that integrating some videoconference tool with moodle will satisfy my project requirement.
Do you think it would be wise to try to develop for tools which already have a solution? As I said in my first message, I found a little about some of the tools you have mentioned and they have some kind of restrictions or are not free.
I checked Project for new developers, but I don't have a lot of experience with PHP and I'm afraid I can't keep up with the project. I have to learn on my own pace, so I think it'll be easier to try something on my own (or in this case, with you guys from this forum helping me).
Thank you so much for helping me, I really appreciate it.