fix to handle "#" character in url

[mkzol]

the player doesn't work as expected on URL having a "#". Audio look the the left part of the first "#" character, then
Uncaught (in promise) DOMException: The media resource indicated by the src attribute or assigned media provider object was not suitable.

Fix is to fix this issue. There is surely a better way to do it

[akrylysov]

Hi! Does this happen when the S3 object name contains the character? Might be happening with other special characters.

[mkzol]

Hello, it appears indeed whenever this character in the filename.
No issue met with other characters so far.
This patch will break if the character is to be considered a property marker (https://developer.mozilla.org/en-US/docs/Web/API/URL/hash). So it should not be replaced in the general case but be handled according the situation.