title: Video Editing Preview doesn't show in blender when opening it on another computer
body: <p>I use blender as a video editing software. I have my blender file and all external media like the videos in one folder. Also, all paths of the files are relative.</p>
  <p>Since I save my work on a cloud I can open it on different devices. On my original computer everythings works fine. On the new computer everythings seems fine - I can open the file and everythings looks simmilar. Except for the fact that nothing will show up in the preview as well as in the rendering.</p>
  <p>I tried to pack all files into .blend but that didn't help either.</p>
  <p>The only difference I found is that on computer 2 blender has a loading bar named Strip Previews at the bottom which stays at 0%.</p>
  <p>Below you can see the screenshots from the different computers which are both Windows 10.</p>
  <p><a href="https://i.stack.imgur.com/GiWIL.png" rel="nofollow noreferrer">Blender on Computer 1</a></p>
  <p><a href="https://i.stack.imgur.com/PBxk0.png" rel="nofollow noreferrer">Blender on Computer 2</a></p>
  <p>I'm a newbie to blender. Hope there is something obvious I missed...</p>