In order to view media files from SkyDrive, you will have to download them first. Google Drive has a great feature that generates a preview any time a video is uploaded. Videos are then streamed from Google's service when viewing them on Google Drive.
Google does not allow the same for MP3 files: those must be downloaded. I am going to assume that this has something to do with record industry concerns, but at least Google isn't blocking the file type from being shared.
More Paid Storage Options
Google Drive users are given a variety of capacity options to suit their needs. The cheapest is 25 GB for $2.49 per month. Additional storage options are available to 16 TB, although that sets you back $800 each month.
There's an added bonus to all this space: Gmail accounts gets 25GB of storage, and any unused space can also be used for photos you may have stored in Google's Picasa photo service.
SkyDrive offers 20 GB of storage for only $10 a year, a cheaper entry price, but it caps its storage at 100 GB for $50 a year.