Flash Player works just fine onYouTube.
I have FlashPlayer 18.104.22.168 installed on:
Windows XP Professional Coroprate Edition (SP3 - 64bit)
Windiows Vista Ultimate (SP2 64bit)
Windows 7 Ultimate (SP1 64 bit)
Windows 8 Enterprise (64 bit)
Windows 8.1 Enterprise (64bit)
Mac OS 10.6.8 Server
Mac OS 10.7.5
Mac OS 10.8.5
Mac OS 10.9.2
Internet Explorer 9, 10 &11
Safari 5, 6 & 7
The ONLY one that gives me trouble is IE11.
That doesn't mean a lot, I'm sure, but it's the root of your problems, and Flash Player has nothing to do with it.
Microsoft "rewrote" the User-Agent Strings for the abomination they call their latest and greatest browser. User-Agent Strings are what websites use to identify the browser you're using and provide the proper content for it's browser engine, like ActiveX stuff, and Flash or HTML5 video. Thanks to the geniuses in Redmond, WA, the User-Agent Strings for IE11 (which has a Trident engine), ID it as either "Gecko" (Firefox) or "Webkit" (Chrome). Problem is: when the site the directs to the content for one of these two engines, the Trident engine in IE can't intepret it and the site then sees IE as an "unidentified" browser.
The problem with an unidentified browser is that the plug-ins in that browser aren't recognized either, so even though you're up to date, it says you need the latest Flash Player when you use IE11. YouTube... has converted to HTML5 video so if it doesn't detect Flash Player, it can display HTML5 (MP4) video which requires no plug-in to play.
Microsoft has no plans to "fix" the mess they've created because they think it's a great idea to block you out of the websites you visit.
They recommend using "Compatibility View" and pretending that you're using an older verison of IE... Problem with that is that it's seen limited success, and you have to enable it for EVERY page that has problems... individually.
I'm not big on "pretending" so I recommend actually using another browser.
ANY of those will work where IE11 won't, with the Flash Player Plug-in (For all other browsers), and Chrome doesn't even need that because it has its own Flash Player plugin built in.
Thank you. It just automatically started working again. And when It wasn't I tried Google Chrome and it had the same issue as IE 11. I don't know exactly what the deal is but I wish I would have never went with IE 11. It seems like I woke up one day and it was automatically updated to this version. I have Know idea as to what you were describing to me but it sounds like you are knowledgeable. In my opinion, I don't think flash player is automically built into chrome due to I went to the list of things turned on. The way it looked to me was everything installed on my hard drive came up in the list of things enabled or disabled. But that's just me. But still, when flash crashed or whatever it was, I couldn't get videos on chrome nor IE so their is definitely something wrong somewhere and I'm not sure if its the browsers or the product but to me it sounds like a little of both.