Even that once failed me. I was to give a presentation about a paper I did at my university and I had used some fonts in it that I rather liked. The problem was that the computer didn't like them (and they weren't actually embedded within the PDF), which lead to all of the text in the presentation being cut off and more or less ruined it.
Now it's PDF/A or nothing, thankfully even LibreOffice Impress lets me export those files under File > Export as > Export as PDF > General > Archival (PDF/A, ISO 19005): https://en.wikipedia.org/wiki/PDF/A#Description
No animations or other dynamic content, but for those I can just link to YouTube or show a local MP4 file or whatever. It's simple and hasn't failed me since. Oh also, if a computer at a given place has a web browser, then it's possible to open those files. No other software needed, no logins to web platforms that must be up, nothing.
Even that once failed me. I was to give a presentation about a paper I did at my university and I had used some fonts in it that I rather liked. The problem was that the computer didn't like them (and they weren't actually embedded within the PDF), which lead to all of the text in the presentation being cut off and more or less ruined it.
Now it's PDF/A or nothing, thankfully even LibreOffice Impress lets me export those files under File > Export as > Export as PDF > General > Archival (PDF/A, ISO 19005): https://en.wikipedia.org/wiki/PDF/A#Description
No animations or other dynamic content, but for those I can just link to YouTube or show a local MP4 file or whatever. It's simple and hasn't failed me since. Oh also, if a computer at a given place has a web browser, then it's possible to open those files. No other software needed, no logins to web platforms that must be up, nothing.