Etiquette for sending private messages: text, audio, or video?

Whether privately messaging someone via email, social media DM, or mobile text, which is better... writing, audio, or video? Here's my personal rule: 1. Writing is most respectful because it's the quickest for the other person to read. 2. The more of a relationship I have with someone, the more they'll likely be patient enough to listen to my audio / watch my video message to them... yet, if it's something I'm asking for / requesting, it's still more respectful to write if possible.  3. If recording audio/video, try to keep it under 1 minute 😅 and more about sharing emotion... not information, which can be shared via writing. 4. Except if I'm volunteering help to someone / doing them a favor, then audio/video longer is fine, but aim for no more than 3 minutes unless it's really super helpful to go longer 😄 5. Another exception -- if I'm responding to a client/student on a Q&A call and it's a video that will be watched by others, then of course, going longer (as you know I do!) than 3 minutes is normal 😂 What are your feelings when receiving a private message from someone you don't know super well?  Do you prefer writing, audio, or video?  Comment and let's discuss below.  You're allowed to disagree with me 😊 (If you cannot see -- or write -- comments below, it means you're not logged in.)