Feasible to change the default media player to mediaelement?
Carlos there is no way to do that currently. It is possible to write an add on to do it.
It would be a filter, and the admin would place it higher in the list than the default multimedia plugins filter. You would write it to handle the filetypes that media element can handle and leave the rest up to the Multimedia plugins filter.
It would be cool. Sadly it is not there already.