I have some diploma/result PDF's in Google Drive, and for some reason Google Drive thinks some of them are videos (type: Flash) and won't preview them online.
Here is a screenshot of the Google Drive page:
Also note the video icon on the left for some files, while others are correctly seen as PDFs. I can open all files just fine on my PC (with Adobe Acrobat and SumatraPDF).
Does anyone know why this happens? And how to fix it?
Edit: I tried to re-save the files using both Adobe Acrobat and SumatraPDF, as well as 'printing' them to a new pdf file (using Microsoft Print to PDF on Windows 10), however the problem still stays the same. I've also send a bug-report to Google as suggested in one of the answers.