Yes, you can use Motion Array assets in your derivative works and share your derivative works on platforms including a Podcast.
Please note that the audio must be used in such a way that it is underneath voice-over and is not played stand-alone.
If you plan to use Motion Array music that is registered with a Performing Rights Organization (P.R.O), you may need to pay fees to the P.R.O. depending on the circumstances. You can learn more about P.R.O here.
It's also important to note that there are some assets that are for editorial use only, and can not be used for commercial purposes, you can learn more about those assets here.
Happy content creating!