This is driving me crazy. So I watched a video on youtube last night through my chromecast. The notification shows up like normal. This morning, however, it's still there?? I cannot swipe to dismiss. I've reset my watch (which is a pain in the ass as we all know) only to find the notification pop back up. I then turned my phone off and the notification went away; but once I turned my phone back on it came back. I tried casting a new video from youtube and the notification doesn't change to the new video, it stays as the video from last night. I force closed, cleared data, cleared cache for youtube--nothing. What the hell? Any further suggestions would be great as I'm out of ideas. I'm using a nexus 5 on stock 5.1 and an Asus Zenwatch.

EDIT: After doing the above for the 4th time, it finally went away. Not sure how; but it's finally gone. Anyway thanks for the help.