The biggest thing is picking any random video and getting it to open. If I pick a video that's a few days old, the chance of it loading has been near 0. I've talked with @meno about this and he said it's related to the IPFS backend but I'm hoping they move away from it. (Though I did just try and load an older video now and it worked, maybe this issue has been fixed in the last week?)
I've posted from @rishi556.lambo so that's why you don't see anything from me. A lot of it has been initial testing to see "hey can I move here instead of youtube". 4K support would be great, but not a big priority. I also had issues with upload speeds before, but maybe this has been improved too. I'll give it another try later this week as a creator and share feedback.
RE: Core dev meeting #80