odysee, only print the fields if they have a proper value set.

layouts/partials/odysee.html

@@ -2,8 +2,11 @@
 }}{{ $width := .Param "video_width" | default (.Param "odyseeVideoWidthPercentage")
 }}{{ $url := .Param "video_page"
 }}
+{{ if $url }}
 <p><a href="{{ $url }}" target="_blank" rel="noopener noreferrer">{{ $url | markdownify }}</a></p>
+{{ end }}
 
+{{ if $src }}
 <iframe
    id="odysee-iframe"
    style="width:{{ $width }}%; aspect-ratio:16 / 9;"
@@ -11,6 +14,7 @@
    allowfullscreen>
 </iframe>
 <br/>
+{{ end }}
 
 {{ with .Params.video_desc }}
    {{ range . -}}