New version avoids my problems with subtitles, thanks.
As far as fonts, I don't know what would be best.
I think the standard font dir would be:
/Library/Fonts/

In this dir I have:
Arial Rounded Bold
ArialHBBold.ttf
GujaratiMT.ttf
Brush Script
Optima.dfont
Copperplate.dfont
Baghdad.ttf
NewPeninimMTInclined.ttf
Times New Roman
Sathu.ttf
EuphemiaCASRegular.ttf
EuphemiaCASItalic.ttf
Arial Narrow
Kai.dfont
CorsivaBold.ttf
HelveticaCY.dfont
华文楷体.ttf
Comic Sans MS
Skia.dfont
Silom.ttf
Arial Black
Chalkboard.ttf
Nadeem.ttf
ArialHB.ttf
MshtakanRegular.ttf
NISC18030.ttf
GenevaCY.dfont
GillSans.dfont
Impact
MshtakanOblique.ttf
Andale Mono
Ayuthaya.ttf
KufiStandarGK.ttf
CharcoalCY.dfont
Raanana.ttf
Papyrus.dfont
Song.dfont
MarkerFelt.dfont
HelveticaNeue.dfont
Hoefler Text.dfont
华文宋体.ttf
华文仿宋.ttf
Courier New
AmericanTypewriter.dfont
Georgia
Corsiva.ttf
EuphemiaCASBold.ttf
NewPeninimMTBold.ttf
InaiMathi.ttf
Cochin.dfont
Fang Song.dfont
NewPeninimMTBoldInclined.ttf
PlantagenetCherokee.ttf
Herculanum.dfont
ChalkboardBold.ttf
儷宋 Pro.ttf
NewPeninimMT.ttf
MshtakanBold.ttf
GujaratiMTBold.ttf
AlBayan.ttf
Zapfino.dfont
Verdana
Trebuchet MS
Thonburi.ttf
BigCaslon.dfont
Arial
Apple Chancery.dfont
DevanagariMTBold.ttf
DevanagariMT.ttf
Webdings
Baskerville.dfont
DecoTypeNaskh.ttf
Didot.dfont
Futura.dfont
BiauKai.dfont
RaananaBold.ttf
Krungthep.ttf
AppleMyungjo.dfont
MshtakanBoldOblique.ttf
Apple Symbols.ttf
AlBayanBold.ttf
Gurmukhi.ttf
Apple LiSung Light.dfont