Sorry but this video is utterly crap, I'm not a Linux fanboy who thinks it's the silver bullet for everything but he describes it best himself at the beginning of the video:
Some people think they know a lot while they have no idea what they are talking about.
Ironically this applies to his own video...
I.)His computer is infected by a virus, therefore the myth 'you cant have a virus on linux' is busted
-> Nobody really said that. Step one of any myth-busting video: Make up some myth so you have something to bust. He refers to this video of another Youtuber and this website http://whylinuxisbetter.net
In the linked Video the other youtuber says that there are only a few Linux viruses and almost none of them are floating around in the wild/ most are patched and the website says:
Linux hardly has any viruses. [] Of course, a Linux virus is not impossible to get.
However, Linux makes it very hard for this to happen
Both are correct statements, none of them implies it's impossible to get a virus.
-> The files he presents as the 'virus' are Windows executables.
-They don't run under Linux
-Linux is very strict about who is able to install something, even if they ran on his system (what's not the case) the only one who can allow this is himself by entering his root password
-If a Windows virus somehow is executed with the help of a compatibility layer like wine, it still doesn't harm the system in 90% of cases.
The only thing he proved is that files which can be harmful on a Windows machine can somehow end up on you disk when you run Linux.
First nobody ever said that's not the case, second in the comments of a follow up video he admitted that he created this situation by downloading and copying these files into the said directory, but only to reproduce a scenario which he encountered 'for real'.
You are the judge.
He also uses malware and virus as if it was the same, acts like 'a file is on the disk' means the file can be executed or already was executed and came up with some strange theories in the comments before he locked them about how this files infect Windows machines in the network which showed that he knows nothing about servers/clients/networking at all.
II) You have to reboot in a lot of cases etc. therefore the 'you don't have to reboot Linux' myth is busted
Again, nobody said you'll never have to reboot again. Just less (basically only after kernel updates, the new 4. kernel reduced those cases even further).
Again: first make up some myth, then bust it to sound intelligent.
What I say to this entire 'you can't do ____ without rebooting, you can't swap your HDD, you can't do ____ ( in the video but also in the comments):
Do not say “You can't … in Linux” when the truth is “I can't … in Linux”.
Sorry that may sound arrogant at the first view but that's the truth.
You can do that stuff, you only need to have the knowledge of how to do it.
But that does NOT mean that those things aren't real advantages of Linux or shouldn't be mentioned or are myths.
Because it IS technically possible to do things in Linux which you can't do in Windows (I think he was referring to Linux vs Windows promotion)
When I read things like “I had problems with application XY/network connection/whatever and after a reboot it worked, so don't tell me you don't have to reboot” well.. you don't have to reboot.
You only didn't know which service you had to restart and you didn't know how to do that. (for example).So yeah maybe YOU had to reboot, but not Linux.
I also have no idea what he wanted to show with that Firefox thing, and what memory cache has to do with the need of reboots, you can clear cache without rebooting, he simply didn't know how to do that, you obviously can kill any process but apart from that I also don't see what kind of problem he tried to represent there.