The screenshots may no longer be available, but the situation described is something that I have encountered frequently in the past.
To address this, you can visit cloudconvert.com to convert your font to a .woff file. This can be done either by utilizing resources from your site or locating the .ttf file on your system. Once you have obtained the .woff file, save it in your website's root folder and proceed to create a font-face entry in your CSS:
@font-face
{
font-family:'myawesomefont';
src:url('../<path to .woff file>/convertedhelvneue.woff') format('woff');
}
Next, add the following line to the CSS selector:
.myawesomeclass
{
font-family:myawesomefont;
font-size:16px;
}
Before publishing your work, it is advisable to investigate any relevant licenses. I hope this explanation proves helpful for your project.