As you can make your page interactive by adding bookmarks, links and buttons using Acrobat X Pro you can also add multimedia files to your document in the same way. To add rich media in your files go to the Tools pane, then click Content to open options and from Add or Edit Interactive Objects you can select Multimedia option.
You will see you are having options to select the kind of media is such as video, sound, SWP file or 3D. Click one of the given options for example if you choose video tool and go to part of document and select it where you want to add the video.
You will prompt to add file now and Insert Video dialog will open. You can also customize advanced options if you click on Show Advanced Options you will have activation, appearance and poster image setting in launch section. Controls section has Playback Controls setting for it and video section contains Chapter Points to set. Choose a file and click OK.
The video is added and you will see it is not of same size as your selected area for video. You can position it on specifies area and can resize its window size. When you will play the video you will have many option, you can also view it in full screen mode.
To add a sound file in the document go to the Tools pane, then click Content to open options and from Add or Edit Interactive Objects, select Multimedia and choose Sound and drag it on selected page. Now you will ask to choose the sound file which you want to play here.
You can customize advanced options for Activation, Appearance and Poster Image settings, customize the settings and then browse and select the desired sound track, and then click OK. Now move on next or previous page and then again open the page where you added sound, and sound will triggered. In the same way you can add flash content in your document.