Thumbnails act as a mini marketing image for your videos. They should be bold, engaging and clear in order to make viewers follow through to your content.
Thumbnails are also a good way of representing and maintaining your brand presence on YouTube, therefore it is best to be consistent with branded thumbnails across the videos on your channel.
Long form content has a really positive effect on the YouTube algorithm due to an increased watch time.
Not only does this mean your content surfaces higher on YouTube, but you also generate a higher source of revenue.
Long form content can be anything from compilation mixes to full album streams, so get producing.