Jack, I think you completely missed the point made by hwrddrn in his/her reply to you. Read it again. What does it say? I'll reiterate what it says. It says to remove the hard drive from your non-functioning computer and put it in another computer or in an external hard drive enclosure.
Do you understand now? We know you can't turn on your computer. Thus, the suggestion to remove the hard drive, which is where your video files are stored, and put the hard drive it in another computer or in an external hard drive enclosure.
Now, of course, I surmise you do not have another computer. So, that part of the suggestion is not an option in your case unless you know someone who would be agreeable to temporarily adding your hard drive to their computer as a second hard drive. Again, this would be temporary; once the files were retrieved, the hard drive could be removed from the computer.
However, the hard drive might not work; a failed hard drive might be part, or all, of what is wrong with your computer. In that case, you simply aren't going to get your video files back unless you can pay a high fee to a specialized data retrieval service. And, even they might not be able to retrieve your files.
So, the first thing you need to do is determine whether the hard drive works. And, I think the only way you will be able to do this is to have someone more knowledgeable than you make this determination. And, since that service will most likely involve a fee paid to a professional, you will need some money to pay such fee if you're going to get this issue resolved.
