Chulbuli.bulbul.s01ep01t02.1080p.hevc.web-dl.hi... Online

No – find T01 for the full Episode 1. Sometimes uploaders incorrectly tag a 20-min part as the whole episode.

Most likely “Hearing Impaired” subtitles – i.e., closed captions that include sound descriptions like [laughs], [door creaks], [tense music]. Could also be a language tag (Hindi), but HI is standard industry shorthand for hearing-impaired tracks. Chulbuli.BulBul.S01EP01T02.1080p.HEVC.WeB-DL.HI...

High Efficiency Video Coding (H.265). This codec offers: No – find T01 for the full Episode 1

Why would Episode 1 be split into T01 and T02?
Common reasons: To watch seamlessly: play T01 , then immediately play T02

To watch seamlessly: play T01, then immediately play T02. Or merge them using MKVToolNix (append segment).