Open Assistant is a good project but still a while away from proper release in a format you can run yourself afaik. I didn't watch the 20 minute video but I did participate in the early training and data collection for it. It's really nice to see all these open source alternatives arrive but we're unfortunately still a long way from replicating gpt-4 level LLM's on home computers. I have an #ai-discussion room in my discord where people post a lot of these sorts of projects if you're interested :)