Fan problem

google "SMC reset"

 

That's normal behauviour.
When you use powerful apps like Photoshop, your processor produces more heat and therefore the fans need to spin up. That's fine. And those fans can be really loud.
When watching videos in Safari, you use Flash, which again needs a lot of power. That's why your fans rev up.
From what you're saying, everything is fine with your Mac.

 

Wow now that is some font manipulation

MacBook pros get loud when stressed..

 

So,
a few questions are in order:
- Which machine is this you have trouble with? (Apple Menu->About this mac)
- Operating system?
- What version of photoshop are you running?
- Is your machine actually heavily stressed (Activity monitor can tell your CPU utilization (Applications->Utilities->Activity monitor)
- what are your temperatures ( iStat will tell you) and fan speeds.

RGDS,

 

In Activity Monitor, change My Processes to All Processes and sort by CPU, then post.

 

What you really need to do is:
- wait until one of those moments, when the fans start whining
- have a look at activity monitor (just as B... suggested)
- get some kind of reading on those temperatures
=> Post that data...

I'm not saying it necessarily is a symptom of anything worrying (in some MBP's merely running a time machine backup sends them screaming), but we might as well make sure...

Weird. That page usually works. Try this link instead.

Also, if you do not want it as a widget, Marcel Bresink's Temperature Monitor is a classic.

RGDS,

 

Sort by CPU.

 

Click on "% CPU" at the top of the list to sort by CPU. If it sorts in increasing order then click it again to have it sort in decreasing order, which is what we want to see.

 

Are you looking at videos on Twitter? You keep saying "only" but it seems to me like you're underestimating what it takes to do what you're doing.

http://guides.macrumors.com/Help:Forum_Rules

 

It sounds like there's a lot of dust in your system. You need to open it and remove all of the dust.

 

iFixit should give you a good idea of how to open up your MacBOOK Pro.

Viewing pages that uses flash or videos can cause the fan to spin at full speed. It's very normal!