If you choose a 2024 model for tailgating as an example, the 8-foot truck bed version is 79.4 inches wide, so you can load those grills plus a few people besides.
Your question is actually about two things: How to produce a footnote, and how to embed a citation to a reference (here: an URL) into such a note. Footnotes are produced with the standard LaTeX command \footnote{I am using \columns in beamer to show two pictures. After I added \footnote{ExampleText} after captions, the ExampleTest just appear in each column. Now I want to show all of the ExampleText in the bottom of the slide instead of each column, how can I do this? MWE:
How to display the footnote in the bottom of the slide while using ...
So here an example with only one measure per head an foot: ... Now, you can remove the % before some of the options to see, how the influence the size and position of page header and page footer. For example here an example that shows the change, from the example above to an example with headheight=60pt,headinclude=true,footheight=60pt ...
You might want to use the tablefootnote package (and probably you want to remove the \begin{footnotesize} \end{footnotesize}, otherwise the table is printed in footnote size; replace the center -environment by a simple \centering; and remove the ~ before the \tablefootnote, because the ~ causes a (non-breakable) space before the footnote-mark). Minimal example: