Footnotetext without text where it can stick to

Question

I am having the problem that almost at the end of my document, I want to add a figure with a footnote in its captin. While this is no problem inside the document where always new text comes where I can put the \footnotetext{} so that the footnote from \protect\footnotemark is forced onto the same page as its mark, this is a problem at the end where no usual text follows anymore. I tried to put the figure inside a minipage and use \vspace to put the footnote at the end of the page (suggested in another discussion), but all that happens is that the footnote is displayed at the end of the previous page. Also I tried to add \phantom or \color{white}{any text} to create some invisible text after the image where the footnote could stick to. But without success. Here is a not so short MWE - the problem does not happen here as most of the document is deleted. Summary: what i need is to force the footnote from \protect\footnotemark and \footnotetext onto the same page as the image. Problem: footnote is on previous page.

\documentclass[a4paper,oneside,abstracton]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
%%Language settings
\usepackage[english]{babel}
\usepackage{csquotes}
\usepackage[hypcap=false]{caption}
%%Math, astro, chemical packages and options
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amsbsy}
\usepackage{mathtools}
%%Paper adjustments
\usepackage[a4paper,bottom=3.1cm]{geometry}
\usepackage{booktabs}
\usepackage{lscape}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{threeparttable}
\usepackage{longtable}
\usepackage{subcaption}
\usepackage{afterpage}
\usepackage{tabularx}
%%Citations and Referencing
\usepackage[]{natbib}
\bibpunct[, ]{(}{)}{;}{a}{,}{,}
\usepackage[nottoc,numbib]{tocbibind}
\usepackage{hyperref}

\begin{document}

\begin{figure}[t]
\centering
\includegraphics[width=5\linewidth]{Img1}
\caption{Img1 Caption.}
\label{Fig:Img1}
\end{figure}

\begin{figure}[h]
\centering
\includegraphics[width=0.5\linewidth]{Img2}
\caption{Img2 Caption.\protect\footnotemark}
\label{Fig:Img2}
\end{figure}
\footnotetext{\url{xyz}, Date.}

\begin{table}[!htb]
\centering
\caption{Table1 Caption}
\label{Table:Table1}
\begin{threeparttable}
\begin{tabular}{cccc}
\cmidrule{1-4} \morecmidrules \cmidrule{1-4}
File Id. & Time [UT] & x & y \\
\midrule
fts & long time ago & & \\
\cmidrule{1-4} \morecmidrules \cmidrule{1-4}
\end{tabular}
\begin{tablenotes}
    \item Note 1: abc
\end{tablenotes}
\end{threeparttable}
\end{table}

\end{document}