My workaround is to use Brave with shields down and only load one video per monitor. Or use a different browser altogether. I’m using a 2 screen pod setup with 16GB ram Mac Mini Intel i5 2GHz + with Turbo Boost. I ruled out hardware after using some diagnostic apps and I tried running Brave through some troubleshooting apps with no luck.

After switching to Safari and Firefox in Mac OS both loaded normally with no buffer or delay. I’m almost positive you’re right @Will Monte and it’s a browser based bug. I’ll use a different browser when reviewing recorded in browser videos.