If your brick mortar is as soft as shown in this video then you have problems.  Soft brick mortar is weak and prone to rapid erosion due to water action.  This normally occurs first at the bottom of brick walls and window ledges.  Excessive erosion of the mortar will promote water entry behind the brick and possibly into the building if it happens quickly.  Loss of mortar also weakens the brick creating the potential for its failure structural failure.  It is normally recommended that brick veneer mortar have a compressive strength of 750 psi which cannot be easily scratched with a sharp tool.  (Labratory testing of the mortar is not nomrally possible once installed and if testing is desirable test samples would need to be prepared during its installation.)

To repair this condition you need to contact a mason for options based upon your specific construction and failure.  Patching repairs can be effective in some cases although you may expect more maintenance over time.  Full repair would require replacement of the brick if necessary.