I don't normally watch it, but decided to see if it works from their website.
Went to http://stream.nbcsports.com/nbcsn/ with my PC's Firefox browser and logged in.
Got a message saying disable your ad blocker. Normally I would give up and leave the site, but I disabled it temporarily.
Then I get a message to unblock 3rd party cookies. Normally wouldn't, but I did that temporarily.
When it said I had to install Flash player, that's when I gave up trying, not gonna happen.
Here's a Live TV FAQ from their website.
https://www.nbcsports.com/FAQ
Q: What do I need to watch video on NBCSports.com/Live
A: In order to watch any video on NBCSports.com/Live, you must have recent browser that supports HTML5 Media Source Extensions (MSE) and for certain events you must install the latest version of Adobe® Flash®.
Q: I am experiencing issues playing video, does it matter that I have blocked 3rd party cookies?
A: Yes, you will need to unblock 3rd party cookies, in order to view video.
Since this site is where Channels DVR streams from, not sure if this affects Channels DVR TVE.