To open word documents,
powerpoint presentations and spreadsheets
install Microsoft
Office or Open
Office (free). To
print to Adobe .pdf at home install doPDF. To
view powerpoint presentations in a Google
Chrome web browser without downloading them install the Docs
Online Viewer extension.
If you don't have access to a phone or other device, install the emulator on your laptop (at the time of writing there is no working iOS emulator though, only Windows at the moment) and record videos using any video recording app e.g. OBS, etc..
FlipGrid app(search for "FlipGrid" but the app is actually called Flip - will be used to upload videos):