Changes
{{#widget:YouTube|id=bnztMTSGUV0|width=300|height=200}}
<div style="display:inline-block;">{{#widget:YouTube|id=IGKAKEFJmU8|width=200|height=100}}<br/>Some caption</div>
<div style="display:inline-block;">{{#widget:YouTube|id=lIvUl2ViK34|width=200|height=100}}<br/>Some other caption</div>
{{#widget:YouTube|id=Mz6aeT2L59g|width=200|height=100}}
{{#widget:YouTube|id=ik46WXaNJlk|width=200|height=100}}