Someone steted, that when your bow kinda jumps toward your target when you release - your hold is ok...so your grip should be quite relaxed...no gripping -> torgue.

Longbows in other hand need to be shot with firm grip...mean those Hill syles with broom stick handles. You kinda master a longbow with authority, so you hold your bow to show who is the boss here    :D

Exactly what McDave said for the recurves and similar grip long bows. I will add that my Howard Hill straight grip, seems to prefer a full contact firm grip. Could just be me.     Ken

I need to do a video shooting while holding the lower fade out.

Not sure what you mean  Terry by "holding the lower fade out" but I watch all your videos. I will be looking for this one.Ken

Would like to see the video, Terry!

Moebow provided some great insight on the topic several years back.  Here is the tread; it has helped me so much I keep it bookmarked.
http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=005763#000000