Should I get a new Mac?

Well, I'm currently using a MacBook Pro 15 "2008 unibody, I'm happy with it, I only use it on YouTube, Netflix, Pages, Sonos, and Spotify, but it gets very hot on Netflix and YouTube - about 100 C ° and so The fan turns on properly and that bothers me a lot.

He is not the fastest anymore either. It's just El Capitan on it. It can't be higher.

Can you tell me what the reason for overheating is and what can I do about it? I must also say that I have already eliminated the fan with a compressor, so dust is no longer there.

And, would it be worthwhile to sell the Mac and then buy a MacBook 12 "and if so, how much could you ask for such a Mac, and how much should I spend on a Mac?

If you want to enlarge the electronics Schrottberg

How about something new, such as a Hp / Lenovo laptop with Linux or Windows?

It's best to look for good fans.

Better not, I do not like Windows and the design is much better with Apple, so rather not.

And Linux? There are practically endless designs

With such an old device, I would change the thermal grease. And for what you do with the device you do not really need a MacBook, would you now Final Cut and Co. I would use it so understand, but so…

I do not want to get out of the Apple ecosystem. Then a MacBook 12 "will make the most sense for me.

Understandably, alternatively, I might need a Macbook Pro of the last few years, maybe refurbished.

All previous answers were wrong or from Apple haters who were not asked. The tip with the thermal grease is wrong because the CPU is soldered.
If you are satisfied with the Mac, the cheapest solution is to install an SSD while cleaning the cooling fans and cooling the graphics card.

You get about 150, - for this and then I would buy a used MBP from 2012.

Stay with the Mac and take care