Youtube playback problems

Hi!
I`m not sure if this is a codec-related problem but I`ve wasted many hours looking for solution and nothing seem to work. Maybe someone here can help. Please do if any of you know something about this.

I`ve got problem playing videos on pages like Youtube using Firefox or Chrome - crappy playback, dropping frames, stuttering. I`ve recently installed "youtube flash video player" and changed default player to flash in place of html5. Playback got way-better but it`s still not smooth. You might say that my PC is to weak/old but the thing is when I play the same videos on Internet Explorer there are no problems at all. Playback i smooth and uninterupted, nomatter what I do. It doesn`t even matter if I use html5 or flash player. I tried disabling Media Foundation but it changed nothing, on FF and IE as well. Turning on hardware acceleration also doesnt change much. CPU usage is less then 50% at full hd.

What more can I try short of switching browser for good?

Sorry for bad language, i haven`t use english for some time and i`m a little bit rusty

Please help. Thanks.

The Adobe Flash plugin does not use Media Foundation or any other external codecs.

Updating your graphics driver might improve smoothness.

The thing is I already got latest g. driver. Anyway what I don`t understand is why everything ok using IE browser .+

Something to try:
Type about:config in the Firefox address bar. Change value of browser.sessionstore.enabled to False.

Firefox options > Advanced > General > disable hardware acceleration

Admin wrote:Something to try:
Type about:config in the Firefox address bar. Change value of browser.sessionstore.enabled to False.

no such entry

hardware acceleration already disabled

You can create the value if it is missing.

You can also try changing browser.sessionstore.interval from 15000 to a larger value such as 60000.

no effect

update: this is wierd because i think it worked on flash as good as on htm5 using IE before but now when i`m using flash on IE everything is exactly like on FF. still, IE + html5 = perfect playback, FF + html5 = high frame drop, FF + flash = some frame drop

You probably have disabled hardware acceleration in the Flash settings? That might explain why IE has worse performance compared to html5.

enabled or disabled no difference

dom.ipc.plugins.flash.disable-protected-mode = True

Remove folder:
%localappdata\Macromedia\Flash Player

i`m not sure, maybe it got a little bit better on html5 but it`s hard to tell. still far from smooth playback

The settings above are all possible solutions I could find.

ok, thank you for trying

When i try to play video from youtube MPC-HC shows the following message

"No videos formats found; please report this issue on https://yt-dl.org/bug. make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube -dl with the --verbose flag and include it's complete output".

I tried to update it via powershell and Command prompt in the same directory but it show error. Maybe i was wrong. Why not just integrate youtube-dl in codecguide installation package and update it along with the other media player components.

There are plans to add an option in the installer the download/update it during installation.

But it may still be needed to update it manually once in a while. Youtube often makes changes on their site that requires a fix in youtube-dl.

You can download it here:
http://ytdl-org.github.io/youtube-dl/download.html

Isn't possible to set a task on Windows that run?

Code:

youtube-dl.exe -U