Also, now my site keeps jamming up - and all of the videos that I have posted are now blank on my blog.
None of the videos are "blank". I can see them and every large image on the front page of your blog which loads very slowly due to how many post your have on the front page and what's in them.
If you cannot see the videos and I can using Firefox 7.0.1 that likely indicates you have one of these issues:
1. Are you using http:// or https:// see http://en.support.wordpress.com/https/
2. Which browser and version of it are you using? Have your tried clearing your browser cache and cookies? http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=32050
3. Is your browser version up to date? You can upgrade any browser version here.
4. Do you have third party cookies enabled?
Do you have another browser you can try?
Re: improving page loading time on your blog.
Go here please > Settings > Reading
Blog pages show at most__posts
and reduce the number of posts appearing on your front page so it does not take forever to load. Note we have 3-4 seconds page loading time and after that studies demonstrate people will not wait - they click out.
Also be aware that large images and embeds in every post slow page loading time and page loading time is a page ranking factor. Please consider splitting text in post by inserting "the more" tag into your posts, prior to the large images and/or embeds as that will improve page loading time. There will then be a "read more" link in an excerpt on the front page and when clicked the post will appear on it's own page.
WordPress.com suddenly showed up on my blog and when I clicked on it - it took me to a page where my blogs are posted. Which I find very strange - as I don't know what this means.
That sounds to like a visit to a global tag page.
Nothing we can do about it as far as contacting support until 10/29, unless someone knows how to opt out of this feature, which may not be possible.
There is no opt out.