Simple queue priority

Hi made those rule to get a good iptv service and to have fair amount of bandwith to all remaining connection. I have a 15M/1M link

/queue type add kind=pfifo name=TVqueue pfifo-limit=2000
/queue simple
add burst-time=5s/5s max-limit=1M/8M name=TVqueue1 priority=6/6 queue=TVqueue/TVqueue target=
192.168.92.9/32
add max-limit=1M/14M name=PCQqueue queue=pcq-upload-default/pcq-download-default target=
192.168.92.0/24

I noticed that when the PCQ turns red my IPTV service is very impacted even if the priority of my first queue is lower. Any recommandations?

Rock.