Very generic filenames should not be used when uploading, as sooner or later someone else will use same name and this will overwrite the first file. File names should be clear and descriptive, without being excessively long.
The embedded file will probably need to precede the text for the paragraph and file to align.
Using the YouTube widget and a table for formatting. Use the video ID from the URL. i.e. if the video's URL is https://www.youtube.com/watch?v=xj5rbKed2E4, then the embed code (in a table) would be:
{| style="float:right; clear:both; font-size:85%; text-align: left; border:1px silver solid;"
| {{#widget:YouTube|id=xj5rbKed2E4|width=300|height=200}}
|-
|+ align="bottom"|Using a Hakko BCM or CM tip for drag soldering.
|}