Chrome Version       : 63.0.3239.116
OS Version: 10032.75.0
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari: Not applicable
    Firefox: Not applicable
    IE/Edge: Not applicable

Here is a description of a strange chromeOS bug (or is it a feature???)

See if you can duplicate it.

Try the following on your Pixelbook (this is what I did)

1. In your Downloads folder, create a file called junk.ts or any file with a ts extension.  You can put any content you wish in the file.  The ts extension is used for TypeScript files.  TypeScript is a programming language that is an extension of JavaScript, and I use it a lot.

2. Using the Files app on your Pixelbook or Chromebook, notice that a copy of (or reference to) junk.ts has been created in your Videos folder, perhaps in a subfolder of Videos.  You will not be able to delete the file from there.

3. Go back to your Downloads folder and delete the junk.ts file

4. Go back to your Videos folder and note that the junk.ts file has been deleted.

While this is not a horrible bug, I think that it is still worth investigating and fixing, 


There must be some file association that automatically associates some video property to files having a ts extension.  It is known that there are at least two uses of the ts file extension; 1. It is used for TypeScript files.  2.  It is used for video stream files


Is there any way to override this behavior so that files with ts extensions that are stored in the Downloads folder are not also seen in the Videos folder?

What is the expected result?  A TypeScript file with extension .ts that is placed in the Downloads folder should not also appear in the Videos folder.  That is very misleading. 


What happens instead of that?  The TypeScript file with extension .ts that is placed in the Downloads folder also appears in the Videos folder.


Please provide any additional information below. Attach a screenshot if
possible.

UserAgentString: Mozilla/5.0 (X11; CrOS x86_64 10032.75.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.116 Safari/537.36