Timeline and playback issues DR for Mac

Hello! Ive made a loom to show my issue but it is saying I can't post a URL can I share a URL in private messaging? If so please message me if you think you can help! Thank you!

Basically my timeline is connecting or showing what should be playing in the playback window. I have tried to go back and forth from different timelines and it appears to be stuck or frozen.

We need much more information from you, like hardware, sources, settings etc.
And then, put a single space somewhere in your URL and you can post it.
BTW, it's all in the FAQs…