RD, There are two ways to speedrun HL. One is Single-Segment, in which you play the whole game without any segments recorded. The second one is Segmented Speedrun, in which there are segments or parts of a certain speedrun recorded and then all segments are compiled into one, whole speedrun.
For the run that I did, it's a Single-Segment. For us speedrunners for HL, it's VERY disregarding for deaths to happen during the run, as it diminishes a lot of time.
It's slightly impossible to have a HL version for it to have no loading screens. I used Bunnymod Pro for this run.
"tl;dr joj" - legenda 2016