Been poking around under the hood and it's extremely easy to change the assets this game uses, and add your own if you like.
If you don't like a particular picture or video you can find it in the media folder and just delete it, copy one of the others in that folder, and rename the copy to the same as the deleted one. Doing this lets you make it so every video is bbc or no videos are bbc, you can also replace them with others like hentai or furries if that's your jam. The limits are that you can't increase the number of options or what format you can use without touching the code, most of the videos are .mp4 with a few .webm files while the pictures are a pretty random mix of .jpg and .png.
So to put 70 videos into the "Media/Sex/Oral/Female/Male" folder, which would be a bunch of girls blowing guys, and replace all of the original videos, you would number the new videos 0-69, and add them to the folder, you would then go into the text editor and look for the section labelled "/*Oral */" and find the line that has:
"_domGender == "Female" && _subGender == "Male" (without "quotes")
(the game has dom and sub backwards for some reason, finding the one that has "_domGender == "Male" && _subGender == "Female" will affect the wrong set)
The line below that will read:
"<<set _pick = GetSexPick("Oral", _domGender, _subGender, 12)>>" (again, without quotes)
You would replace the 12 with a 69 and save the file, you would then open the public.html file in your browser of choice and the game would choose any of the new videos you added whenever your character get's a blowjob from a woman, or gives one if your character is female. You will get an error if you refresh the page to re-load the game with your new changes, you have to close the tab the game is in and open the game from the public.html every time you make a change.