That's EIA-608 analog closed captioning data. It should be on line 21, which is within the vertical blanking interval of the SD signal. Either the line was shifted down or the VBI was captured as being active video.
You can use ffmpeg. Make your subtitles with Aegisub or manually with a text editor. ASS subtitles are fancier, but SRT are simpler if you want to manually make them.
Alignment & Margin
The default settings will likely work, but you can control the general location, or alignment, using the "keypad" coordinates. For example, 2 is bottom center. For more ...
Adobe Premiere Pro allows you to create caption files (including SRT) and export them individually (as SRT files) or embedded with the actual video. This link gives a pretty good overview of how it's done in Premiere.
There is a 3-step solution-
Insert an empty caption in the beginning
Move captions to 0 mark of your sequence
If you hold CMD/CTRL while dragging out the end of a caption, it ripple-shifts all the captions after it. So just grab the tail of first, empty caption and extend it to the mark where the text should begin
The subtitles in the MP4 is a mov_text (tx3g) stream which isn't supported in MPEG-TS.
MPEG-TS support either DVD subtitles or DVB teletext. The former is a bitmap subtitle format and ffmpeg can't convert text to bitmap. FFmpeg has no encoder for the latter. Your best bet is to burn the subtitles but this means re-encoding the video.
ffmpeg -i in.mp4 -vf ...
1) Is probablly the easyest. You can download it from YouTube and merge it in Premiere Pro. Easyest way is to burn it in, so you wont have any struggles with other social media plattforms.
If you have basic programming knowledge, ypu could write a script whoch automatocally downloads and adds the sub titles from YT.
The default commands for any clip edit are:
Extend Next Edit to Playhead (Shift-W)
Extend Previous Edit to Playhead (Shift-Q)
So selecting those captions, you should be able to use those hotkeys and it will match the next edit or the previous one.
If this isn't what you're looking for, dig into the hotkeys. Hotkeys are the lifeblood of navigating ...
YouTube's automated closed captions are actually getting better and better (and it's free!). Even if you don't use the automated (speech-to-text) captions in YouTube, it has a neat tool that pauses while you type a transcript (or lets you upload a transcript) and then automatically adjusts all the timings. You can find it in the Closed Captions section of ...
Most episodic (network and cable) TV is captioned by service bureaus who use proprietary software. Some of the big players are VITAC, NCI, and WGBH, and there are several more. They all provide various levels of service, and some rely more heavily on automation / voice recognition etc than others. This is all offline captioning and the goal is accuracy in ...