doesn"t the h5 LVB format under ios only use hls? Why doesn"t it look like a big delay compared to PC-side web? Is 
 the reason for server-side optimization? Can the delay of Qiniuyun reach this level? 
 doesn"t the h5 LVB format under ios only use hls? Why doesn"t it look like a big delay compared to PC-side web? Is 
 the reason for server-side optimization? Can the delay of Qiniuyun reach this level?