Here's how you can check...
1) Upload to YouTube or another video service
2) See if it's a valid video that you can watch
It's possible there is still malicious code embedded in the mp4, but by default you shouldn't be at risk because of how mp4 files are handled. Plus, you are using Windows 10. If you were on Windows XP I would tell you to be a lot more careful, but embedded viruses in files have become less common and less effective over the years, and Windows 10 is very recent. You should be okay.
That said, you can use something like MalwareBytes to scan it if you are using something else. It appears you are using Norton Semantics, based on the folder name with 'Endpoint Protection'. I may be wrong though...
You can also upload the file to an online virus/malware scanner. There are plenty of sites that allow you to upload a file and then they will automatically submit it to 50-100 different scanners to check for risks and then display the results to you. One thing you can also try is right click -> view properties. Make sure the extension is truly .mp4 and nothing else. If it is, then I can say with 99% confidence that you can open the mp4 file without concern. Even if it's infected, it can't actually harm your computer if it's truly just a .mp4 file. The mp4 has to be executed as a program (or script), and a true .mp4 file is not something you execute. You view the mp4 with a program. The only way for the infected code inside an mp4 to infect your computer is if another program or file is already infected. For example, a hacked video viewer or fake/disguised program could open an mp4, retrieve the infected code, and execute it. However, the mp4 file alone cannot do this. So if the only file you are worried about is the mp4, and you do not have any infected or fake/dangerous programs on your computer, then you should be safe - even if the mp4 is infected. Check when it was downloaded, what the original file name was, etc. You should be able to discover a fair bit about the file just from properties. Once you have done that, perhaps you can go to your browser and check your downloads to try to see what site you downloaded it from.
Let me give you one more example:
1) I can write malicious code inside a .txt file. I could even write code to delete your entire harddrive or corrupt it.
2) However, if you open up my text file, it's always just going to be a .txt file. You would open it in Notepad or something. Because it's just a text file, my code will not run on your computer. Even though it's "malicious code", it's still just sitting there as text.
3) This is very similar to an infected mp4. You can put malicious code embedded in an mp4, but at the end of the day - it's still just an mp4. A video viewer will attempt to open the mp4, but it still will not run/execute any code that's embedded there. Like the text file, the code would just exist without being used.
4) However, if you took my VIRUS.TXT file and turned it into a BATCH (.bat) file, and then opened it... The code inside would execute.
5) Similarly, if you changed the MP4 file to something else, it's possible it could be run/executed on your computer when you open it.
6) If your computer is not already infected, a dangerous mp4 file could be changed to "file.exe" and dangerous code in a TXT file could be changed to "virus.bat" without issue. If the computer is not already infected, merely having those infected files (as .exe/.bat) will not ruin your computer
until you open them.
7) For all of these reasons, I believe you are most likely safe - even if the mp4 file is infected...which it seems like it is not.
Also worth noting is that it could either be... "CP Rent" as in like... Castle Place Rent, for a real estate presentation. However, I don't think that's the case. I believe it is actually "CPR, ENT" as in: cardiopulmonary resuscitation (CPR) and 'ear, nose, throat' for ENT. Have you been to any CPR / lifeguard / EMT / ENT / doctor tutorial sites, or classes, or anything like that? Have you worked on any projects related to a medical field?
Anyways... those are my two theories for what this video contains if it is indeed valid, but hopefully you can scan it properly, figure out where you downloaded it from, and open it or upload it to YouTube so we can see what it is
Good luck!
