Possible to create a live event watch party?

We are planning a virtual event where the sessions will be live-streamed on Youtube. We would like to provide an option to register together with colleagues or friends, and then follow the stream during a watch party, with the ability to share your thoughts and reflections in a group chat with your peers. When someone registers for a watch party, they would be provided a link to share with their preferred group of people.

I understand this would be possible with Watch2Gether. My question though is whether you (beforehand) could control what should be broadcasted at the watch party, e.g. by linking/locking a specific URL to a specific watch party?
Is it also possible to limit to text chat only, no video/audio chat since that would disturb the watching and listening?