>>100062928Assuming you're making soundposts of videos: Have a method to record the stream, or download a segment of a VOD. There's hundreds of ways to do this. Some are easier and more intuitive than others.
Then have a method to convert the video into a webm that doesn't have sound because we can't post webms or mp4s with audio on this board. Many people use FFmpeg, or WebMConverter.
If you're isolating the audio you'll need a method to pull the audio from a video. You can also do this with FFmpeg.
Then upload either the version with sound onto catbox, or isolate the audio and upload that to catbox.
Then edit the filename of the converted webm or mp4 with the soundpost format. For instance *****[sound=files.catbox.moe%2F******.mp3].webm
where the first asterisks are what you want to name the file and the second asterisks are the 6 unique alphanumeric digits you receive when you upload anything onto catbox.
Keep in mind the filesize limit on this board is 4MB, and the longer the clip is the more difficult it will be to stay under that limit.