I always get this problem on my computer - when I play youtube videos, they have very slight 'catches' in the play - tiny pauses that interrupt the song. It isn't noticeable when when watching non-music vids. Terribly annoying and seemingly unfixable. It wasn't always this way..

Anyone else have this problem, and/or any advice?

If it's an older computer I'd suggest checking your background processes/programs and close any that are not essential. Windows gets cluttered and messy after long time use as well so it may just need some tlc to get it back into shape. Try updating your video drivers too.

If you're using Google Chrome, ignore the following because Flash updates itself automatically.

For IE or another plugin based browser continue:

Download the Flash uninstaller from the following link: http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html

After uninstalling Flash, download the latest manual installation EXE file from here: http://www.adobe.com/products/flashplayer/distribution3.html

If you're using Internet Explorer, choose "Run" to install immediately.

If you're using another browser like Firefox or Opera, save tbe file, close the browser and then run it.

Another reason you might be experiencing the problem is your security software scanning the YT video while it's playing. Most AV has an option to disable the scanner temporarily and it's worth a try to see if that's the culprit. The following site explains how to temporarily disable most AV: http://www.bleepingcomputer.com/forums/t/114351/how-to-temporarily-disable-your-anti-virus-firewall-and-anti-malware-programs/

Get firefox, install 'youtube downloader' extension, save and replay at your leisure. AA

...or it might be that your router is not up to the job.

Get firefox, install 'youtube downloader' extension, save and replay at your leisure. AA

I use Firefox, but whenever I've had those downloaders they slow everything down terribly.

...or it might be that your router is not up to the job.

I doubt that's the case, I'm at a university, and the internet here is extremely fast.