How can I enable download link in the Media browser library tab
1 Create your view, add the fields you'd like displayed.

2 On the "Content: Video" field settings, choose the "preview" option under formatter - this displays the thumbnail.

3 Add the "Content: Path" field to your view

4 Uncheck the settings for label, check the box for "exclude from display"

5 Click on rewrite results and select "Use Absolute Link"

6 Next you'll need to reorder your fields so that "Content: Path" is above "Content: Video".

7 Edit your Content: Video settings.

8 Go to rewrite results and check "Output This Field as a Link".

9 Put [path] as the link path.

10 Save it.

You are done.