How to, using CMD/Powershell, find all files in a directory (including subdirectories), and then display files that have certain extensions

Question

I need to make a script using CMD/Powershell that can find all files in a directory (and subdirectories) that end in extensions associated with media files. I have a Unix script that can do this:

 find /directory/ | egrep -e ".*.(jpg|tif|png|gif|wav|mp3|ogg|flac|wma|aac|m4a|flv|webm|ogv|gif|gifv|avi|wmv|mp4|mpg|3gp)"

(I'm sure there's a better way to do this, but it works, and has no problems for me.)

However, I need to do this for Windows. The file types are as follows:

• jpg
• tif
• png
• gif
• wav
• mp3
• ogg
• flac
• wma
• aac
• m4a
• flv
• webm
• ogv
• gif
• gifv
• avi
• wmv
• mp4
• mpg
• 3gp

Edit: Even though I got the right answer, the possible duplicate is not correct. This is because I needed it to be outputted to a file. My script that I wrote using bgalea's answer is as follows:

@ECHO OFF
set $ext=*.jpg *.tif *.png *.gif *.wav *.mp3 *.ogg *.flac *.wma *.aac *.m4a *.flv *.webm *.ogv *.gif *.gifv *.avi *.wmv *.mp4 *.mpg *.3gp
dir /s/b c:\Users%$ext% > mediafiles.txt
echo The locations of the media files were copied to mediafiles.txt 
pause

Answer 1

Powershell FTW!

$extensions = @("*.jpg", "*.tif"...ect ect)

Get-ChildItem C:\temp -Include $extensions -Recurse

Answer 2

 dir /s /b c:\*.3gp c:\*.mpg* c:\*.mp4

Etc

C:\ says to start at c:. /s does sub folders, /b gives only names.