Hello,
Your post is very chaotic.
As I understand the same link plays in system player, yes or no?
You not provide example link which is not playable in the gstplayer. Can you provide it to check?
Do you have some message when you try to play such not working links without buffering?
Anyway, for SH4 I strongly recommend to use exteplayer3 (with ffmpeg libs with OpenSSL support).
Regards,
SSS