If you downloaded the original file from FBI fansub, most of you guys surely noticed a major lagginess during the minute of 8:21 due to the subtitle-rendered P.A. Room sign. I found that the one and only subtitle file size for this video was about 22MB! I checked it with Aegisub & the sign itself took about over 50,000 lines. That’s so ridiculous! So, I removed the lines that involves the sign rendering since it’s not really that important. As a result, the file GREATLY reduced to 22KB & GREATLY improves the playback performance.
Here’s the file with improved subtitle rendering. Enjoy!