Hello! So I downloaded this program today and I'm not entirely sure how to use it. I made a video in Adobe After Effects and it played both the audio and the video in the preview. I intended on saving it to my phone camera roll so that I could text it to one of my friends, so I rendered it as an MOV or Quicktime file. But when I went to watch the version I saved to make sure both the audio and the video would play, only the audio played and the video was just a black screen. I can't find any answers on this. Please help!
You need to study up on rendering, codecs and the proper use of the tools. If you customized any setting in AE or in the Adobe Media encoder without knowing what you are doing then you caused your own problem.
To solve the problem either use the default lossless preset in the Render Cue's Output Module and then render a deliverable file as an H.264 mp4 (only format you should be sending to the general public right now) using the Above Media Encoder and one of the YouTube presets that matches your frame size. Come to think of it, if your composition settings say Custom you have probably also fouled things up. Video has standards that must be adhered to.
To learn about rendering either start here: Basic AE or type rendering in the search help field at the top right corner of AE and spend some time studying. Nobody knows how to properly modify render settings without an education.