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No issues with google chrome and any videos. Well i use binary nvidia-drivers with the nvidia gpu hardwired to the outputs. no intel gpu in use.

Chrome plays here the most media contents. Opera and firefox only a subset of those.

HTML5 is hardly in use. youtube wanted to use html5, as i tried it the most content could not be played with html5.

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My guess are some flaky open source gpu drivers or an intel gpu. Or a lack of proper GPU VRAM, or RAM.

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Are you using the pepperflash plugin to use chromes flash in firefox? NPAPI vs PPAPI

https://get.adobe.com/flashplayer/otherversions/

Lots of sites are picky about your flash version. The chrome flash has the windows-ish version and works for lots of sites. While some sites work on the more traditional flash plugin with the linux version number. Other sites can be made to work by using hexedit and putting the windows version number where the linux version number was. And then there's the HAL stuff for hulu and other quirks.

Adobe Flash was discontinued for a long time for Linux users outside Pepper Flash Chrome/Chromium plug-in, and development on it only resumed about a year and a half ago or so as far as I remember, which explains why the version numbers are different.

@Shadow_7, what files would need to be edited? Just wondering for reference, I have no intentions of installing the Flash plugin on my netbook.

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You would hexedit the libflashplayer.so file. Or was it libflashplugin.so? It's been so long since I did anything flash. Once hulu stopped having free content, I had no need for it.

Thread has been closed. OP does not seem to be interested in participating at this time. Thank you to all for your helpful replies.