I've had playback issues since the player update too. The site used to work fine for me but now I very frequently experience videos not loading after hitting play or when they do having playback stop frequently to buffer when it really shouldn't do based on my connection. I've tried this on several different connections, mobile and fibre, chrome and firefox and I have the same issue. I'm wondering if it's region specific & related to the CDN you're using since I don't see that many people complaining about what is a pretty poor experience?
When I look at the browser console there's a request that is continually returning an error, if a dev wants to message me I'm happy to send logs.
Edit: The blocked requests were actually related to network level adblocking I have which is blocking what I assume is your video analytics, it's blocking requests to the following domains: dw.cbsi.com & sb.scorecardresearch.com. Can anyone tell me if you'd expect that to affect video playback? It could just be coincidence but when I notice that the video is playing back correctly it seems to be doing less calls to these domains, I didn't whitelist those domains it just seems like when they're being called less frequently playback is good.