You can do this by changing the CSS of your OBS CLR Browser plugin (which means you don't capture it, but it loads straight inside OBS). This is the default CSS that you would need to customize:
::-webkit-scrollbar {
visibility: hidden;
}
html {
height: 95%;
width: 95%;
}
BODY {
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
font-size: 14px;
font-style: normal;
font-variant: normal;
font-weight: normal;
color: #FFF;
height: 95%;
width: 95%;
}
.nick {
font-weight: bold;
text-transform: capitalize;
text-shadow: 1px 1px 0 #000;
}
.tag {
display: inline-block;
text-indent: 21px;
background-position: 0 center;
background-repeat: no-repeat;
display: inline-block;
vertical-align: bottom;
height: 18px;
min-width: 18px;
width: expression((document.body.clientWidth < $width) ? '18px;:'auto');
padding: 0;
margin-right: 3px;
margin-bottom: -1px;
text-indent: -9999px;
border-radius: 2px;
-moz-border-radius: 2px;
-webkit-border-radius: 2px;
overflow: hidden;
}
.turbo {
background-color: #6441a5;
background-image: url(http://chat-badges.s3.amazonaws.com/turbo.png);
}
.moderator {
background-color: #009900;
background-image: url(http://chat-badges.s3.amazonaws.com/mod.png);
}
.broadcaster {
background-color: #000000;
background-image: url(http://chat-badges.s3.amazonaws.com/broadcaster.png);
}
.staff {
background-image: url(http://chat-badges.s3.amazonaws.com/staff.png);
}
.admin {
background-image: url(http://chat-badges.s3.amazonaws.com/admin.png);
}
.creator {
background-image: url(http://deepbot.deep.sg/images/obschat/creator.png);
}
.vipbronze {
background-image: url(http://deepbot.deep.sg/images/obschat/vipbronze.png);
}
.vipsilver {
background-image: url(http://deepbot.deep.sg/images/obschat/vipsilver.png);
}
.vipgold {
background-image: url(http://deepbot.deep.sg/images/obschat/vipgold.png);
}
.chat_line {
padding-left: 5px;
padding-right: 5px;
margin-right: -10px;
padding-top: 2px;
padding-bottom: 3px;
line-height: 16px;
word-wrap: break-word;
color: #FFF;
}
#chat_box {
}
#chat_container {
border-radius: 10px;
background-color: rgba(0, 0, 0, 0.6);
padding: 10px;
height: 95%;
width: 95%;
}