• adding multiple clips to timeline at once: just select all and drag in. make sure not to select other file types e.g. timelines, it won't work
• exporting: rocket page -> add file name and location -> mp4 format H.265 -> Add to Render Queue -> (In Render Queue:) Render All
• removing pauses:
• automatic subtitles:

(obs: add source "display capture" and maybe "audio output capture", then "start recording")