for some reason when i try to viewport render from this blender file I get "error intializing video stream". I append and link the logo to a new project but all i see is a grey plane.
I restarted my computer and on reopening blender the project was not in my recent projects list but the data was saved when I opened it from the "open" thingy.
According to these guys at Blender Artists:
https://blenderartists.org/t/error-initializing-video-stream/492570
That is because the devs changed the encoding video files from old Blender versions and that file you're trying that on is very old. In the fourth post they seems to have found a solution, you can give it a small read and see if that solves your problem.
