Burn caption into video

What's the best way on Windows to offline embed the text in an SRT
companion file to an MP4 video before uploading a short video clip to a web
site?
I made a short (ten second) video with my phone to upload to a web site.
I tried a few methods to remove the exif metadata which probably worked.
Then I created a simple SRT text file with the desired captions.
 1
 00:00:05,000 --> 00:00:10,000
 This is the first line of text.
 This is the second line of text
Then I tried to burn in (embed, hardcode, merge) that SRT into the MP4 so
that I only upload a single MP4 with a caption on the 2nd half of the MP4.
I tried Handbrake, VLC, MkvToMp4, VidCoder, Shotcut & a few others (all of
which failed but probably they failed mostly due to my own user error or
from my following of bad AI-generated instructions found in my searches).
Given that it's not as simple as it may seem, what method on Windows do you
use to burn an SRT file into a short video prior to upload to a web site?